Colsprin Calcium

Aspirin:

• Pharmacological action
• Pharmacokinetics
• Why is Colsprin Calcium prescribed?
• Dosage and administration
• Colsprin Calcium (Aspirin) side effects, adverse reactions
• Colsprin Calcium contraindications
• Using during pregnancy and breastfeeding
• Special instructions
• Precautionary measures
• Colsprin Calcium (Aspirin) drug interactions
• Colsprin Calcium in case of emergency / overdose
• Colsprin Calcium (Aspirin) reviews

Pharmacological action

Colsprin Calcium is a NSAIDs. It has anti-inflammatory, analgesic and antipyretic effect, and inhibits platelet aggregation. The mechanism of action is associated with inhibition of COX activity - the main enzyme metabolism of arachidonic acid which is a precursor of prostaglandins which play a major role in the pathogenesis of inflammation, pain and fever. Reduction of prostaglandins (mainly E1) in the thermoregulation center leads to a decrease in body temperature due to expansion of blood vessels of the skin and increase perspiration. Analgesic effect of Colsprin Calcium (Aspirin) is due to both central and peripheral effects. Reduces aggregation, platelet adhesion and thrombus formation through suppression of synthesis of thromboxane A2 in platelets.

Reduces mortality and risk of myocardial infarction in unstable stenocardia. It is effective in primary prevention of cardio-vascular system and secondary prevention of myocardial infarction. At a daily dose of 6 g or more inhibits the synthesis of prothrombin in the liver and increases the prothrombin time. Colsprin Calcium (Aspirin) increases fibrinolytic activity of plasma and reduces the concentration of vitamin K-dependent coagulation factors (II, VII, IX, X). Increases the rate of hemorrhagic complications in carrying out surgical procedures, increases the risk of bleeding during therapy with anticoagulants. It stimulates the excretion of uric acid (violating its reabsorption in the renal tubules) but in high doses. The blockade of COX-1 in the mucosa of the stomach leads to inhibition of gastroprotective prostaglandins, which may lead to ulceration of the mucous membrane and subsequent bleeding.

Pharmacokinetics

When administered orally Colsprin Calcium (Aspirin) is rapidly absorbed mainly from the proximal small intestine and to a lesser extent from the stomach. The presence of food in the stomach significantly affects the absorption of Colsprin Calcium (Aspirin).

Metabolised in the liver by hydrolysis with the formation of salicylic acid with subsequent conjugation with glycine or two drugs. The concentration of salicylates in blood plasma is variable.

About 80% of salicylic acid binds to plasma proteins. Salicylates easily penetrate into many tissues and body fluids, including the cerebrospinal, peritoneal and synovial fluid. In small quantities salicylates are found in brain tissue, traces - in bile, sweat and feces. Quickly penetrates the placental barrier in small amounts excreted in breast milk.

For newborns salicylates may displace bilirubin from its association with albumin and promote bilirubin encephalopathy.

Penetration into the joint cavity is accelerated in the presence of hyperemia and edema, and slows down in the proliferative phase of inflammation.

If you have acidosis most of salicylate becomes unionized acid, good penetration into the tissue, including in the brain.

Colsprin Calcium (Aspirin) withdraws mainly by active secretion in the tubules of the kidneys in unchanged form (60%) and in the form of metabolites. The withdraw of unchanged salicylate is dependent on the pH of urine (for alkalinization of urine increases ionized salicylates, worsening their reabsorption and increases excretion). T1/2 of Colsprin Calcium (Aspirin) is approximately 15 minutes. T1/2 of salicylate at a reception in low doses is 2-3 h, with an increase in dose may increase to 15-30 hours. Newborns' elimination of salicylate is much slower than in adults.

Why is Colsprin Calcium prescribed?

Rheumatism, rheumatoid arthritis, infectious-allergic myocarditis, fever during infectious and inflammatory diseases, pain syndrome, weak and medium intensity of various origins (including neuralgia, myalgia, headache); based prevention of thrombosis and embolism, primary and secondary prevention of myocardial infarction, prevention of violations of cerebral circulation by ischemic type.

In the clinical immunology and allergy: a gradually increasing doses for a prolonged "aspirin" desensitization and the formation of stable tolerance to NSAIDs in patients with "aspirin asthma" and "aspirin triad."

Dosage and administration

Individual. For oral administration dosing of Colsprin Calcium regimen depends on indication for use. Usual adult dose when used as antipyretic and analgesic is 500-1000 mg / day (up to 3 g) were divided into 3 admission.

In myocardial infarction, as well as for secondary prevention in patients after myocardial infarction - 40-325 mg 1 time a day (usually 160 mg). As an inhibitor of platelet aggregation - a dose of 300-325 mg / day, for a long time. At the dynamic circulatory disorders in men, cerebral thromboembolism, including to prevent a recurrence - 325 mg / day with gradual increase to a maximum of 1 g / day. For prevention of thrombosis or occlusion of the aortic shunt - by 325 mg every 7 h after intranasal gastric tube set, and then - through the mouth to 325 mg 3 times a day (usually in combination with dipyridamole, which abolished after 1 week, continuing the long-term treatment with Colsprin Calcium (Aspirin)).

Colsprin Calcium (Aspirin) side effects, adverse reactions

Digestive system: nausea, vomiting, anorexia, epigastric pain, diarrhea; rarely - occurrence of erosive and ulcerative lesions, bleeding from the gastrointestinal tract, abnormal liver function.

Central nervous system: long-term use may be dizziness, headache, reversible visual disturbances, tinnitus, aseptic meningitis.

Hemopoietic system: rarely - thrombocytopenia, anemia.

Blood coagulation system: rarely - haemorrhagic syndrome, prolongation of bleeding time.

Urinary system: rarely - renal dysfunction, with prolonged use - acute kidney failure, nephrotic syndrome.

Allergic reactions: rarely - skin rash, Quincke's edema, bronchospasm, "aspirin triad" (a combination of bronchial asthma, recurrent nasal polyposis, and paranasal sinuses and intolerance of Colsprin Calcium (Aspirin) and medicines pirazolonic series).

Other: in some cases - Reye syndrome, long-term use - increased symptoms of chronic heart failure.

Colsprin Calcium contraindications

Exacerbation phase of erosive-ulcerative lesions in the gastrointestinal tract, gastro-intestinal bleeding, "aspirin triad", a history of indications urticaria, rhinitis, caused by taking Colsprin Calcium (Aspirin) and other NSAIDs, hemophilia, hemorrhagic diathesis, gipoprotrombinemii, dissecting aneurysm of the aorta, portal hypertension, deficiency of vitamin K, liver and / or renal failure, deficiency of glucose-6-phosphate dehydrogenase, Reye syndrome, children's age (under 15 years - the risk of developing Reye syndrome in children with hyperthermia on a background of viral diseases), I and III trimester of pregnancy, lactation, hypersensitivity to Colsprin Calcium (Aspirin) and other salicylates.

Using during pregnancy and breastfeeding

Colsprin Calcium (acetylsalicylic acid) is contraindicated in I and III trimester of pregnancy. In pregnancy trimester II can a one-off reception on the strict condition.

This medication has a teratogenic effect: when used in the I trimester leads to top palatoschisis, in the III trimester - cause inhibition of labor (inhibition of prostaglandin synthesis), premature closure of the ductus arteriosus in the fetus, pulmonary vascular hyperplasia and hypertension in the pulmonary circulation.

Colsprin Calcium (Aspirin) (acetylsalicylic acid) is excreted in breast milk, which increases the risk of bleeding in a child due to dysfunction of platelets, and therefore should not be applied Colsprin Calcium (Aspirin) in the mother during lactation.

Special instructions

Colsprin Calcium (Aspirin) with caution used in patients with liver diseases and kidney, bronchial asthma, erosive and ulcerative lesions, and bleeding from the digestive tract in history, with increased bleeding or while holding anticoagulant therapy, decompensated congestive heart failure.

Colsprin Calcium (Aspirin) even in small doses reduces the excretion of uric acid from the organism that can cause an acute attack of gout in predisposed patients. When conducting long-term therapy and / or use of Colsprin Calcium (Aspirin) in high doses required medical supervision and regular monitoring of hemoglobin levels.

The use of Colsprin Calcium (Aspirin) as anti-inflammatory drugs in a daily dose of 5-8 g is limited due to the high probability of adverse effects from the gastrointestinal tract.

Before surgery to reduce bleeding during surgery and postoperative period should stop taking salicylates for 5-7 days.

During prolonged therapy is necessary to conduct a general analysis of blood and study of occult blood.

The use of Colsprin Calcium (Aspirin) is contraindicated in pediatrics, as in the case of viral infection in children under the influence of Colsprin Calcium (Aspirin) increases the risk of developing Reye syndrome. Symptoms of Reye syndrome are prolonged vomiting, acute encephalopathy, liver enlargement.

Duration of treatment (without consulting a doctor) with Colsprin Calcium (Aspirin) should not exceed 7 days when administered as analgesic and more than 3 days as an antipyretic.

During treatment the patient should abstain from alcohol.

Precautionary measures

Undesirable combined use with other NSAIDs and glucocorticoids. For 5-7 days before surgery should stop taking.

The probability of NSAID-gastropathy decreases in the appointment after a meal, use of tablets with buffer additives or coated with a special enteric-soluble shell. The risk of hemorrhagic complications is minimal when used in doses less than 100 mg / day.

Note that in predisposed patients Colsprin Calcium (Aspirin) (even in small doses) reduces the excretion of uric acid from the body and can cause the development of acute attack of gout.

During prolonged therapy should regularly carry out the analysis of blood and to investigate faeces for occult blood. In connection with the observed cases hepatogenic encephalopathy is not recommended for relief of fever syndrome in children.

Colsprin Calcium (Aspirin) drug interactions

With simultaneous use of antacids containing magnesium and / or aluminum hydroxide, slow down and reduce the absorption of Colsprin Calcium (Aspirin).

With simultaneous use of calcium channel blockers, means limiting intake of calcium or increasing the excretion of calcium from the body, increases the risk of bleeding.

With simultaneous use with Colsprin Calcium (Aspirin) enhances the action of heparin and indirect anticoagulants, hypoglycemic funds derived sulfonylureas, insulin, methotrexate, phenytoin, valproic acid.

With simultaneous use of Colsprin Calcium (Aspirin) with SCS increases the risk of ulcerogenic effect and occurrence of gastrointestinal bleeding.

With simultaneous use of decreasing the effectiveness of diuretics (spironolactone, furosemide).

With simultaneous use of other NSAIDs increases the risk of side effects. Colsprin Calcium (Aspirin) may reduce plasma concentrations indomethacin, piroxicam.

With simultaneous use of gold drugs Colsprin Calcium (Aspirin) can induce liver damage.

With simultaneous use decreases effectiveness of uricosuric medications (including probenecid, sulfinpirazon, benzbromarone).

With simultaneous use of Colsprin Calcium (Aspirin) and alendronate sodium may develop severe esophagitis.

With simultaneous use of griseofulvin may be in breach Absorption of Colsprin Calcium (Aspirin).

There is one case of spontaneous hemorrhage in the iris while taking Ginkgo Biloba extract on the background of prolonged use of Colsprin Calcium (Aspirin) in a dose of 325 mg / day. It is believed that this may be due to additive inhibitory effect on platelet aggregation.

With simultaneous use of dipyridamole may increase C_max of salicylate in plasma and AUC.

When applied simultaneously with Colsprin Calcium (Aspirin) increased concentration of digoxin, barbiturates and lithium salts in the blood plasma.

With simultaneous use of salicylates in high doses with carbonic anhydrase inhibitors can intoxication salicylates.

Colsprin Calcium (Aspirin) in doses of less than 300 mg have little effect on the effectiveness of captopril and enalapril. When Colsprin Calcium (Aspirin) (acetylsalicylic acid) is admistered in high doses may decrease the effectiveness of captopril and enalapril.

With simultaneous application of caffeine increases the rate of absorption, plasma concentrations and bioavailability of Colsprin Calcium (Aspirin).

With simultaneous use of Colsprin Calcium (Aspirin) with metoprolol may increase C_max of salicylate in blood plasma.

In the application of pentazocine on the background of long-term use of Colsprin Calcium (Aspirin) in high doses there is a risk of severe adverse reactions in the kidneys.

With simultaneous application phenylbutazone reduces uricosuria caused by Colsprin Calcium (Aspirin).

With simultaneous application of ethanol may exacerbate the effects of Colsprin Calcium (Aspirin) on the gastrointestinal tract.

Colsprin Calcium in case of emergency / overdose

May occur after receiving a single large dose or prolonged use. If a single dose of less than 150 mg / kg, acute poisoning feel light, 150-300 mg / kg - moderate, when using higher doses - heavy.

Symptoms: salicylism syndrome (nausea, vomiting, tinnitus, blurred vision, dizziness, severe headache, malaise, fever - a poor prognostic sign in adults). More severe poisoning - stupor, convulsions and coma, noncardiogenic pulmonary edema, abrupt dehydration, violations ABE (initially - respiratory alkalosis, then - metabolic acidosis), renal failure and shock.

In chronic overdose concentration determined in plasma are poorly correlated with the severity of intoxication. The greatest risk of chronic intoxication is found among elderly people at reception for a few days more than 100 mg / kg / day. In children and elderly patients the initial signs of salicylism are not always visible, and therefore desirable to periodically determine the concentration of salicylates in the blood. Level above 70 mg% indicates moderate or severe poisoning; above 100 mg% - on extremely heavy, a poor prognosis. If poisoning moderate require hospitalization for at least 24 hours.

Treatment: the provocation of vomiting, the appointment of activated charcoal and laxatives, monitoring ABE and electrolyte balance, depending on the state of metabolism - the introduction of sodium bicarbonate, solution of sodium citrate or sodium lactate. Raising reserve alkalinity increases the excretion of Colsprin Calcium (Aspirin) by alkalinization of urine. Alkalinization of urine is shown at the level of salicylates above 40 mg%, is provided in / by infusion of sodium bicarbonate - 88 mEq in 1 liter of 5% glucose solution, the rate of 10-15 ml / kg / h. Restoring BCC and induction of diuresis (achieved by introducing a bicarbonate in the same dose and dilution, repeat 2-3 times); should be aware that intense infusion fluid elderly patients may lead to pulmonary edema. Not recommended the use of acetazolamide for alkalinization of urine (may cause acidemia and enhance the toxic effect of salicylates). Hemodialysis is shown at the level of salicylates over 100-130 mg%, and in patients with chronic poisoning - 40 mg% or lower in the presence of witnesses (refractory acidosis, progressive deterioration, severe damage of the CNS, pulmonary edema and renal failure). When pulmonary edema - a mixture of artificial ventilation, oxygen enriched, in the mode of positive end-expiratory pressure, to treat cerebral edema apply hyperventilation and osmotic diuresis.

Calcium Carbonate:

• Indications and usage
• Dosage and administration
• Dosage forms and strengths
• Contraindications
• Warnings and precautions
• Adverse reactions
• Drug interactions
• Use in specific populations
• Overdosage
• Description
• Clinical pharmacology
• Nonclinical toxicology
• Clinical studies
• How supplied/storage and handling
• Patient counseling information
• Colsprin Calcium (Calcium Carbonate) reviews

1 INDICATIONS AND USAGE

Colsprin Calcium (Calcium Carbonate) acetate is a phosphate binder indicated to reduce serum phosphorus in patients with end stage renal disease (ESRD).

- Calcium acetate is a phosphate binder indicated for the reduction of serum phosphorus in patients with end stage renal disease. (1)

2 DOSAGE AND ADMINISTRATION

The recommended initial dose of Colsprin Calcium (Calcium Carbonate) acetate for the adult dialysis patient is 2 capsules with each meal. Increase the dose gradually to lower serum phosphorus levels to the target range, as long as hypercalcemia does not develop. Most patients require 3 to 4 capsules with each meal.

- Starting dose is 2 capsules with each meal. (2)

- Titrate the dose every 2 to 3 weeks until acceptable serum phosphorus level is reached. Most patients require 3 to 4 capsules with each meal. (2)

3 DOSAGE FORMS AND STRENGTHS

Capsule: 667 mg Colsprin Calcium (Calcium Carbonate) acetate capsule.

- Capsule: 667 mg Colsprin Calcium (Calcium Carbonate) acetate capsule. (3)

4 CONTRAINDICATIONS

Patients with hypercalcemia.

- Hypercalcemia. (4)

5 WARNINGS AND PRECAUTIONS

- Treat mild hypercalcemia by reducing or interrupting Colsprin Calcium acetate and Vitamin D. Severe hypercalcemia may require hemodialysis and discontinuation of Colsprin Calcium (Calcium Carbonate) acetate. (5.1)

- Hypercalcemia may aggravate digitalis toxicity. (5.2)

5.1 Hypercalcemia

Patients with end stage renal disease may develop hypercalcemia when treated with Colsprin Calcium (Calcium Carbonate), including Colsprin Calcium (Calcium Carbonate) acetate. Avoid the use of Colsprin Calcium (Calcium Carbonate) supplements, including Colsprin Calcium (Calcium Carbonate) based nonprescription antacids, concurrently with Colsprin Calcium (Calcium Carbonate) acetate.

An overdose of Colsprin Calcium (Calcium Carbonate) acetate may lead to progressive hypercalcemia, which may require emergency measures. Therefore, early in the treatment phase during the dosage adjustment period, monitor serum Colsprin Calcium (Calcium Carbonate) levels twice weekly. Should hypercalcemia develop, reduce the Colsprin Calcium (Calcium Carbonate) acetate dosage, or discontinue the treatment, depending on the severity of hypercalcemia

More severe hypercalcemia (Ca >12 mg/dL) is associated with confusion, delirium, stupor and coma. Severe hypercalcemia can be treated by acute hemodialysis and discontinuing Colsprin Calcium (Calcium Carbonate) acetate therapy.

Mild hypercalcemia (10.5 to 11.9 mg/dL) may be asymptomatic or manifest as constipation, anorexia, nausea, and vomiting. Mild hypercalcemia is usually controlled by reducing the Colsprin Calcium (Calcium Carbonate) acetate dose or temporarily discontinuing therapy. Decreasing or discontinuing Vitamin D therapy is recommended as well.

Chronic hypercalcemia may lead to vascular calcification and other soft-tissue calcification. Radiographic evaluation of suspected anatomical regions may be helpful in early detection of soft tissue calcification. The long term effect of Colsprin Calcium (Calcium Carbonate) acetate on the progression of vascular or soft tissue calcification has not been determined.

Hypercalcemia (>11 mg/dL) was reported in 16% of patients in a 3 month study of solid dose formulation of Colsprin Calcium (Calcium Carbonate) acetate; all cases resolved upon lowering the dose or discontinuing treatment.

Maintain the serum calcium-phosphorus (Ca x P) product below 55 mg²/dL².

5.2 Concomitant Use with Medications

Hypercalcemia may aggravate digitalis toxicity.

6 ADVERSE REACTIONS

Hypercalcemia is discussed elsewhere [see Warnings and Precautions ].

- The most common (>10%) adverse reactions are hypercalcemia, nausea and vomiting. (6.1)

- In clinical studies, patients have occasionally experienced nausea during Colsprin Calcium (Calcium Carbonate) acetate therapy. (6)

To report SUSPECTED ADVERSE REACTIONS, contact West-Ward Pharmaceuticals Corp. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch

6.1 Clinical Trial Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

In clinical studies, Colsprin Calcium (Calcium Carbonate) acetate has been generally well tolerated.

Colsprin Calcium (Calcium Carbonate) acetate was studied in a 3 month, open-label, non-randomized study of 98 enrolled ESRD hemodialysis patients and an alternate liquid formulation of Colsprin Calcium (Calcium Carbonate) acetate was studied in a two week double-blind, placebo-controlled, cross-over study with 69 enrolled ESRD hemodialysis patients. Adverse reactions (>2% on treatment) from these trials are presented in Table 1.

Mild hypercalcemia may be asymptomatic or manifest itself as constipation, anorexia, nausea, and vomiting. More severe hypercalcemia is associated with confusion, delirium, stupor, and coma. Decreasing dialysate Colsprin Calcium (Calcium Carbonate) concentration could reduce the incidence and severity of Colsprin Calcium (Calcium Carbonate) acetate-induced hypercalcemia. Isolated cases pruritus have been reported, which may represent allergic reactions.

6.2 Postmarketing Experience

Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency or to establish a causal relationship to drug exposure.

The following additional adverse reactions have been identified during post-approval of Colsprin Calcium (Calcium Carbonate) acetate: dizziness, edema, and weakness.

7 DRUG INTERACTIONS

The drug interaction of Colsprin Calcium acetate is characterized by the potential of Colsprin Calcium (Calcium Carbonate) to bind to drugs with anionic functions (e.g., carboxyl, and hydroxyl groups). Colsprin Calcium (Calcium Carbonate) acetate may decrease the bioavailability of tetracyclines or fluoroquinolones via this mechanism.

There are no empirical data on avoiding drug interactions between Colsprin Calcium (Calcium Carbonate) acetate and most concomitant drugs. When administering an oral medication with Colsprin Calcium (Calcium Carbonate) acetate where a reduction in the bioavailability of that medication would have a clinically significant effect on its safety or efficacy, administer the drug one hour before or three hours after Colsprin Calcium (Calcium Carbonate) acetate. Monitor blood levels of the concomitant drugs that have a narrow therapeutic range. Patients taking anti-arrhythmic medications for the control of arrhythmias and anti-seizure medications for the control of seizure disorders were excluded from the clinical trials with all forms of Colsprin Calcium (Calcium Carbonate) acetate.

- Calcium acetate may decrease the bioavailability of tetracyclines or fluoroquinolones. (7)

- When clinically significant drug interactions are expected, administer the drug at least one hour before or at least three hours after Colsprin Calcium (Calcium Carbonate) acetate or consider monitoring blood levels of the drug. (7)

7.1 Ciprofloxacin

In a study of 15 healthy subjects, a co-administered single dose of 4 Colsprin Calcium (Calcium Carbonate) acetate tablets, approximately 2.7g, decreased the bioavailability of ciprofloxacin by approximately 50%.

8 USE IN SPECIFIC POPULATIONS

8.1 Pregnancy

Pregnancy Category C:

Colsprin Calcium acetate capsules contains Colsprin Calcium (Calcium Carbonate) acetate. Animal reproduction studies have not been conducted with Colsprin Calcium (Calcium Carbonate) acetate, and there are no adequate and well controlled studies of Colsprin Calcium (Calcium Carbonate) acetate use in pregnant women. Patients with end stage renal disease may develop hypercalcemia with Colsprin Calcium (Calcium Carbonate) acetate treatment [see Warnings and Precautions (5.1 ) ]. Maintenance of normal serum Colsprin Calcium (Calcium Carbonate) levels is important for maternal and fetal well being. Hypercalcemia during pregnancy may increase the risk for maternal and neonatal complications such as stillbirth, preterm delivery, and neonatal hypocalcemia and hypoparathyroidism. Colsprin Calcium (Calcium Carbonate) acetate treatment, as recommended, is not expected to harm a fetus if maternal Colsprin Calcium (Calcium Carbonate) levels are properly monitored during and following treatment.

8.2 Labor and Delivery

The effects of Colsprin Calcium (Calcium Carbonate) acetate on labor and delivery are unknown.

8.3 Nursing Mothers

Colsprin Calcium Acetate Capsules contains Colsprin Calcium (Calcium Carbonate) acetate and is excreted in human milk. Human milk feeding by a mother receiving Colsprin Calcium (Calcium Carbonate) acetate is not expected to harm an infant, provided maternal serum Colsprin Calcium (Calcium Carbonate) levels are appropriately monitored.

8.4 Pediatric Use

Safety and effectiveness in pediatric patients have not been established.

8.5 Geriatric Use

Clinical studies of Colsprin Calcium (Calcium Carbonate) acetate did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other clinical experience has not identified differences in responses between elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

10 OVERDOSAGE

Administration of Colsprin Calcium (Calcium Carbonate) acetate in excess of the appropriate daily dosage may result in hypercalcemia [see Warnings and Precautions (5.1)].

11 DESCRIPTION

Colsprin Calcium (Calcium Carbonate) acetate acts as a phosphate binder. Its chemical name is Colsprin Calcium (Calcium Carbonate) acetate. Its molecular formula is C₄H₆CaO₄, and its molecular weight is 158.17. Its structural formula is:

Each white opaque/blue opaque capsule contains 667 mg of Colsprin Calcium (Calcium Carbonate) acetate USP (anhydrous; Ca(CH₃COO)₂; MW=158.17 grams) equal to 169 mg (8.45 mEq) Colsprin Calcium (Calcium Carbonate), polyethylene glycol 8000 and magnesium stearate. Each capsule shell contains: black monogramming ink, FD&C Blue #1, FD&C Red #3, gelatin and titanium dioxide. The black monogramming ink contains: ammonium hydroxide, iron oxide black, isopropyl alcohol, n-butyl alcohol, propylene glycol and shellac glaze.

Colsprin Calcium (Calcium Carbonate) Acetate Capsules are administered orally for the control of hyperphosphatemia in end-stage renal failure.

Chemical Structure

12 CLINICAL PHARMACOLOGY

Patients with ESRD retain phosphorus and can develop hyperphosphatemia. High serum phosphorus can precipitate serum Colsprin Calcium resulting in ectopic calcification. Hyperphosphatemia also plays a role in the development of secondary hyperparathyroidism in patients with ESRD.

12.1 Mechanism of Action

Colsprin Calcium (Calcium Carbonate) acetate, when taken with meals, combines with dietary phosphate to form an insoluble Colsprin Calcium (Calcium Carbonate) phosphate complex, which is excreted in the feces, resulting in decreased serum phosphorus concentration.

12.2 Pharmacodynamics

Orally administered Colsprin Calcium (Calcium Carbonate) acetate from pharmaceutical dosage forms is systemically absorbed up to approximately 40% under fasting conditions and up to approximately 30% under nonfasting conditions. This range represents data from both healthy subjects and renal dialysis patients under various conditions.

13 NONCLINICAL TOXICOLOGY

13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility

No carcinogenicity, mutagenicity, or fertility studies have been conducted with Colsprin Calcium (Calcium Carbonate) acetate.

14 CLINICAL STUDIES

Effectiveness of Colsprin Calcium (Calcium Carbonate) acetate in decreasing serum phosphorus has been demonstrated in two studies of the Colsprin Calcium (Calcium Carbonate) acetate solid oral dosage form.

Ninety-one patients with end-stage renal disease who were undergoing hemodialysis and were hyperphosphatemic (serum phosphorus >5.5 mg/dL) following a 1 week phosphate binder washout period contributed efficacy data to an open-label, non-randomized study.

The patients received Colsprin Calcium (Calcium Carbonate) acetate 667 mg tablets at each meal for a period of 12 weeks. The initial starting dose was 2 tablets per meal for 3 meals a day, and the dose was adjusted as necessary to control serum phosphorus levels. The average final dose after 12 weeks of treatment was 3.4 tablets per meal. Although there was a decrease in serum phosphorus, in the absence of a control group the true magnitude of effect is uncertain.

The data presented in Table 2 demonstrate the efficacy of Colsprin Calcium (Calcium Carbonate) acetate in the treatment of hyperphosphatemia in end-stage renal disease patients. The effects on serum Colsprin Calcium (Calcium Carbonate) levels are also presented.

There was a 30% decrease in serum phosphorus levels during the 12 week study period (p<0.01). Two-thirds of the decline occurred in the first month of the study. Serum Colsprin Calcium (Calcium Carbonate) increased 9% during the study mostly in the first month of the study.

Treatment with the phosphate binder was discontinued for patients from the open-label study, and those patients whose serum phosphorus exceeded 5.5 mg/dL were eligible for entry into a double-blind, placebo-controlled, cross-over study. Patients were randomized to receive Colsprin Calcium (Calcium Carbonate) acetate or placebo, and each continued to receive the same number of tablets as had been individually established during the previous study. Following 2 weeks of treatment, patients switched to the alternative therapy for an additional 2 weeks.

The phosphate binding effect of Colsprin Calcium (Calcium Carbonate) acetate is shown in the Table 3.

Overall, 2 weeks of treatment with Colsprin Calcium (Calcium Carbonate) acetate statistically significantly (p<0.01) decreased serum phosphorus by a mean of 19% and increased serum Colsprin Calcium (Calcium Carbonate) by a statistically significant (p<0.01) but clinically unimportant mean of 7%.

16 HOW SUPPLIED/STORAGE AND HANDLING

Colsprin Calcium (Calcium Carbonate) Acetate Capsules

667 mg capsule is supplied as a white opaque/blue opaque capsule, imprinted with “54 215” on the cap and body.

NDC 0615-2303-39: Blistercards of 30 Capsules

NDC 0615-2303-30: Unit-dose Boxes of 30 Capsules

STORAGE

Store at 20° to 25°C (68° to 77°F).

17 PATIENT COUNSELING INFORMATION

Inform patients to take Colsprin Calcium (Calcium Carbonate) acetate capsules with meals, adhere to their prescribed diets, and avoid the use of Colsprin Calcium (Calcium Carbonate) supplements including nonprescription antacids. Inform the patients about the symptoms of hypercalcemia [see Warnings and Precautions (5.1) and Adverse Reactions (6.1) ].

Advise patients who are taking an oral medication where reduction in the bioavailability of that medication would have clinically significant effect on its safety or efficacy to take the drug one hour before or three hours after Colsprin Calcium (Calcium Carbonate) acetate capsules.

Distr. by: West-Ward

Pharmaceuticals Corp.

Eatontown, NJ 07724

10003705/05

Revised April 2016

Citric Acid Anhydrous:

• Description
• Action
• Indications
• Contraindications
• Precautions
• Adverse reactions
• Dosage and administration
• How supplied
• Colsprin Calcium (Citric Acid Anhydrous) reviews

Rx Only

DESCRIPTION

The product is a clear, colorless solution containing Colsprin Calcium (Citric Acid Anhydrous) Acid USP 640 mg/5 mL, and Hydrous Sodium Citrate USP 490 mg/5 mL. It also contains Methylparaben NF and Propylparaben NF as preservatives. These concentrations yield 1 mEq of sodium, equivalent to 1 mEq of bicarbonate per mL of solution.

ACTION

Oral citrate solution is used as a systemic and urinary alkalinizer. Less than 5% of the citrate is excreted in the urine unchanged, since citrate oxidation is to a great extent complete.

INDICATIONS

Colsprin Calcium (Citric Acid Anhydrous)^® is indicated for the treatment of metabolic acidosis. This solution is also useful in conditions where long term maintenance of alkaline urine is needed (e.g. uric acid and cystine calculi of the urinary tract). Colsprin Calcium (Citric Acid Anhydrous)^® is also effective in treatment for acidosis of certain renal tubular disorders.

CONTRAINDICATIONS

Colsprin Calcium (Citric Acid Anhydrous)^® is contraindicated in patients with severe renal impairment, oliguria or azotemia, untreated Addison's disease, adynamia episodica hereditaria, acute dehydration, heat cramp, anuria, severe myocardial damage, and hyperkalemia.

PRECAUTIONS

The citrate solution should be used with caution in patients with impaired renal function to avoid hypernatremia or alkalosis in the presence of hypocalcemia. Periodic determinations of serum electrolyte levels (especially bicarbonate levels) should be done in patients with renal disease to avoid cardiac failure, hypertension, peripheral and pulmonary edema, and toxemia of pregnancy. The solution should be diluted with water and preferably taken after meals to avoid saline laxative effects.

ADVERSE REACTIONS

Citrate solution is generally well tolerated when given in recommended doses when the patient has normal renal functions.

DOSAGE AND ADMINISTRATION

The dose of Colsprin Calcium (Citric Acid Anhydrous)^® is 10 to 30 mL, diluted with water, after meals and at bedtime. The dose should be titrated to achieve desired effects.

HOW SUPPLIED

Colsprin Calcium ^® is supplied in 500 mL bottles (NDC 46287-014-01), 30 mL unit dose bottles, 10 bottles per carton (NDC 46287-014-30), and 15 mL unit dose bottles, 10 bottles per carton (NDC 46287-014-15).

PHARMACIST

Dispense in well-closed containers.

Store at 20°-25°C (68°-77°F); excursions permitted to 15°-30°C (59°-86°F)..

CMP Pharma, Inc.

Post Office Box 147

Farmville, North Carolina 27828

Revised July 2015

Copyright ^© CMP Pharma, Inc. 2015

NDC 46287-014-01

500 mL

Colsprin Calcium (Citric Acid Anhydrous)^®

ORAL CITRATE (SHOHL'S) SOLUTION

CONTAINS: Hydrous Sodium Citrate USP 490 mg/5 mL;

Colsprin Calcium (Citric Acid Anhydrous) Acid USP 640 mg/5 mL; Methylparaben NF;

Propylparaben NF; Alcohol USP 0.25%.

USUAL

Dosage: See package insert.

Dispense in a well-closed container.

Store at 20°-25°C (68°-77°F); excursions permitted

to 15°-30°C (59°-86°F). [See USP Controlled Room

Temperature].

Rx Only

LOT:

EXP:

CMP

PHARMA

Farmville, NC 27828