D3
Generic Name
Cholecalciferol (Vitamin D3)
Manufacturer
Square Pharmaceuticals Ltd.
Country
Bangladesh
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Price Details
Current market pricing information
Variant | Unit Price | Strip Price |
---|---|---|
d3 2000 iu tablet | ৳ 2.50 | ৳ 25.00 |
Description
Overview of the medicine
Cholecalciferol (Vitamin D3) is a fat-soluble vitamin essential for the absorption of calcium and phosphorus, crucial for maintaining strong bones, teeth, and supporting immune system function.
Uses & Indications
Dosage
Adults
Typically 2000-4000 IU daily for deficiency, or 800-2000 IU daily for maintenance, adjusted based on serum 25(OH)D levels.
Elderly
Similar to adults, but often higher doses are needed due to reduced skin synthesis and absorption. Consult a physician.
Renal_impairment
Use with caution. Active form (calcitriol) may be preferred in severe cases. Monitor calcium and phosphate levels closely.
How to Take
Oral administration. Tablets can be taken with or without food, but absorption is better with a fatty meal.
Mechanism of Action
Cholecalciferol is biologically inactive but is hydroxylated in the liver to 25-hydroxycholecalciferol (calcifediol) and then in the kidneys to 1,25-dihydroxycholecalciferol (calcitriol). Calcitriol is the active form that promotes calcium and phosphate absorption from the intestine, regulates bone metabolism, and supports immune function.
Pharmacokinetics
Onset
Several hours to days for significant changes in serum 25(OH)D levels.
Excretion
Mainly excreted in the bile and feces, with a small amount excreted in urine.
Half life
Approximately 15-20 days for 25-hydroxyvitamin D; calcitriol has a shorter half-life of 3-6 hours.
Absorption
Well absorbed from the gastrointestinal tract, especially in the presence of bile salts and dietary fat.
Metabolism
Primarily hydroxylated in the liver to 25-hydroxyvitamin D, then in the kidneys to 1,25-dihydroxyvitamin D (calcitriol) and other inactive metabolites.
Side Effects
Contraindications
- Hypercalcemia
- Hypervitaminosis D
- Malabsorption syndrome (severe)
- Severe renal osteodystrophy with hyperphosphatemia
Drug Interactions
Corticosteroids
May reduce vitamin D effects.
Thiazide diuretics
May increase the risk of hypercalcemia.
Bile acid sequestrants (e.g., Cholestyramine)
May impair vitamin D absorption.
Anticonvulsants (e.g., Phenytoin, Barbiturates)
May increase vitamin D metabolism, reducing its effectiveness.
Storage
Store below 30°C in a cool, dry place. Protect from light and moisture. Keep out of reach of children.
Overdose
Symptoms of overdose include hypercalcemia, hypercalciuria, nausea, vomiting, polyuria, thirst, and weakness. Severe cases can lead to renal impairment. Management involves discontinuing vitamin D, restricting dietary calcium, increasing fluid intake, and in severe cases, corticosteroids.
Pregnancy & Lactation
Generally considered safe at physiological doses during pregnancy and lactation. High doses should be avoided as they may be harmful. Consult a healthcare provider before use.
Side Effects
Contraindications
- Hypercalcemia
- Hypervitaminosis D
- Malabsorption syndrome (severe)
- Severe renal osteodystrophy with hyperphosphatemia
Drug Interactions
Corticosteroids
May reduce vitamin D effects.
Thiazide diuretics
May increase the risk of hypercalcemia.
Bile acid sequestrants (e.g., Cholestyramine)
May impair vitamin D absorption.
Anticonvulsants (e.g., Phenytoin, Barbiturates)
May increase vitamin D metabolism, reducing its effectiveness.
Storage
Store below 30°C in a cool, dry place. Protect from light and moisture. Keep out of reach of children.
Overdose
Symptoms of overdose include hypercalcemia, hypercalciuria, nausea, vomiting, polyuria, thirst, and weakness. Severe cases can lead to renal impairment. Management involves discontinuing vitamin D, restricting dietary calcium, increasing fluid intake, and in severe cases, corticosteroids.
Pregnancy & Lactation
Generally considered safe at physiological doses during pregnancy and lactation. High doses should be avoided as they may be harmful. Consult a healthcare provider before use.
Frequently Asked Questions
Common questions about this medicine
Pack Sizes
Shelf Life
24 to 36 months
Availability
Pharmacies, drugstores, supermarkets
Approval Status
Approved
Patent Status
Generic
WHO Essential Medicine
YesClinical Trials
Numerous clinical trials have established its efficacy in treating and preventing vitamin D deficiency, improving bone mineral density, and reducing fracture risk. Ongoing research explores its role in immune modulation and other health outcomes.
Lab Monitoring
- Serum 25(OH)D levels (to monitor vitamin D status)
- Serum calcium levels
- Serum phosphate levels
- Renal function tests (e.g., creatinine)
Doctor Notes
- Consider checking serum 25(OH)D levels before initiating therapy and periodically thereafter.
- Educate patients on dietary sources and safe sun exposure.
- Monitor for signs of hypercalcemia, especially in patients with renal impairment or those taking thiazide diuretics.
Patient Guidelines
- Take as directed by your doctor.
- Do not exceed the recommended dose.
- Inform your doctor about all other medications you are taking.
Missed Dose Advice
If a dose is missed, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one.
Driving Precautions
Vitamin D3 generally does not affect the ability to drive or operate machinery.
Lifestyle Advice
- Ensure adequate sun exposure (if safe and advised).
- Consume a balanced diet rich in calcium and vitamin D sources.
- Regular exercise for bone health.
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Global Brand Names
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