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Alfacalcidol: Brands, Price & Uses in Bangladesh

Alfacalcidol is a synthetic vitamin D analog (1α-hydroxycholecalciferol) used in the following clinical settings: Established/guideline-supported uses: Management of renal osteodystrophy and…

About Alfacalcidol

Indications of Alfacalcidol

Alfacalcidol is a synthetic vitamin D analog (1α-hydroxycholecalciferol) used in the following clinical settings:

  • Established/guideline-supported uses: Management of renal osteodystrophy and secondary hyperparathyroidism associated with chronic kidney disease, including in patients on dialysis.
  • Established uses: Hypoparathyroidism and pseudohypoparathyroidism.
  • Established uses: Vitamin D-dependent rickets and vitamin D-resistant (hypophosphatemic) rickets/osteomalacia, and nutritional rickets/osteomalacia with malabsorption.
  • Adjunct/combination use: Postmenopausal, senile, and glucocorticoid-induced osteoporosis, usually together with adequate calcium intake and as part of a broader osteoporosis management plan.
  • Off-label use (reported in literature, not a primary approved indication): Selected cases of osteoporosis-related fracture risk reduction and certain hypocalcemic states, at the discretion of a specialist physician.

The exact indication and dose of Alfacalcidol should always be individualized by a treating physician based on the underlying condition, serum calcium/phosphate, and renal or hepatic function.

Dosage & Administration of Alfacalcidol

IndicationTypical Adult Dose
Renal osteodystrophy / secondary hyperparathyroidism of CKDInitial 0.25 mcg once daily; titrate in increments of 0.25 mcg at 2-4 week intervals based on serum calcium, phosphate, and PTH response. Usual maintenance 0.25-1 mcg/day (higher doses, up to around 1-3 mcg/day, may be used in dialysis patients under close specialist monitoring).
Hypoparathyroidism / pseudohypoparathyroidismUsually 1-2 mcg/day, individualized and adjusted according to serum calcium; some patients may require higher doses under specialist supervision.
Vitamin D-dependent or resistant rickets/osteomalacia0.25-1 mcg/day depending on severity and response, with calcium/phosphate supplementation as directed.
Osteoporosis (adjunct)0.5-1 mcg/day together with adequate dietary or supplemental calcium, as advised by the physician.

Pediatric dosing (renal osteodystrophy and related conditions): approximately 0.01-0.05 mcg/kg/day, individualized by a pediatric specialist; safety and efficacy outside specific labeled pediatric indications have not been established (see Use in Special Populations).

Renal impairment: Alfacalcidol is specifically indicated for use in renal impairment as it does not require renal activation; nonetheless, dose titration and monitoring of serum calcium/phosphate are essential in this population.

Hepatic impairment: Since activation of Alfacalcidol depends on hepatic 25-hydroxylation, significant hepatic impairment may reduce its efficacy; use with caution and monitor response closely.

Side Effects of Alfacalcidol

Most adverse effects of Alfacalcidol are related to excessive vitamin D activity leading to hypercalcemia and/or hypercalciuria. These include:

  • Common: Nausea, vomiting, constipation, dry mouth, headache, weakness, and anorexia (loss of appetite).
  • Related to hypercalcemia (dose-dependent, more likely with prolonged high-dose use): Polyuria, polydipsia, drowsiness, confusion, muscle or bone pain, metallic taste, and pruritus (itching).
  • Less common but serious: Soft tissue and vascular calcification, worsening renal function, and cardiac arrhythmia (particularly if hypercalcemia is untreated) — see Contraindications and Precautions for related safety information.
  • Rare: Hypersensitivity reactions.

Patients should seek prompt medical advice if symptoms of hypercalcemia occur.

Contraindications of Alfacalcidol

Alfacalcidol is contraindicated in patients with:

  • Known hypersensitivity to Alfacalcidol or any component of the formulation.
  • Hypercalcemia.
  • Evidence of vitamin D toxicity (hypervitaminosis D).

Frequently Asked Questions about Alfacalcidol

What is Alfacalcidol used for?

Alfacalcidol is a vitamin D analog used mainly to treat renal osteodystrophy and secondary hyperparathyroidism in chronic kidney disease, hypoparathyroidism, certain types of rickets/osteomalacia, and as an adjunct in osteoporosis management, since it helps the body absorb and use calcium and phosphate properly.

How should I take Alfacalcidol?

Alfacalcidol is usually taken orally once daily, with or without food, at the dose prescribed by your physician. Do not change your dose or stop taking it without medical advice, as dosing is individualized based on your calcium levels and kidney/liver function.

Can I take Alfacalcidol during pregnancy or while breastfeeding?

Alfacalcidol should be used in pregnancy only if clearly needed, since data are limited and maternal hypercalcemia can potentially harm the fetus; likewise, during breastfeeding it should only be used under medical supervision because it may pass into breast milk. Always consult your physician before using Alfacalcidol if you are pregnant, planning pregnancy, or breastfeeding.

What side effects can Alfacalcidol cause?

Alfacalcidol can cause nausea, vomiting, constipation, headache, and weakness, and with excessive doses can cause symptoms of hypercalcemia such as polyuria, polydipsia, confusion, and muscle or bone pain. Long-term high-dose use may rarely cause soft tissue calcification or affect kidney function. Contact your physician if you notice unusual symptoms.

Who should not take Alfacalcidol?

Alfacalcidol should not be used by people who are hypersensitive to it, or who already have hypercalcemia or vitamin D toxicity. It should also be avoided together with other vitamin D supplements unless your physician specifically directs otherwise, due to the risk of excess calcium.

What should I do if I miss a dose or take too much Alfacalcidol?

If you miss a dose of Alfacalcidol, take it as soon as you remember unless it is almost time for the next dose; do not double the dose. If you suspect you have taken too much Alfacalcidol, stop the medicine and seek immediate medical attention or contact emergency services/poison control, since overdose can cause serious hypercalcemia requiring medical treatment.

Disclaimer

The information provided is accurate to the best of our knowledge, but it does not replace professional medical advice. We cannot guarantee its completeness or accuracy, and the absence of specific information about a drug should not be taken as an endorsement. We are not responsible for any consequences arising from this information, so please consult a healthcare professional for any concerns or questions.

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