
Abday 100MG Caps
Eysys Pharma - Capsule - 100 mg - 10 S
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Cholecalciferol (Vitamin D3) 800 IU per mL (drops)
Delivery across India. Free above ₹999; ₹49 from ₹499, ₹99 below. Chennai express delivery is chargeable.
Isi D3 DS 800 IU Drops is used for treatment and prevention of vitamin D deficiency, rickets and osteomalacia, supportive therapy in osteoporosis, supplementation in infants/children/adults with low vitamin D levels.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Isi D3 DS 800 IU Drops contains Cholecalciferol (Vitamin D3) 800 IU per mL (drops). It belongs to the Vitamin D analogue (Cholecalciferol) class of medicines.
Cholecalciferol is converted in the body to active vitamin D, which increases intestinal absorption of calcium and phosphate. This helps maintain normal bone mineralization and supports muscle function.
Oral drops: use the calibrated dropper as directed by the physician. Can be taken with or after food; in infants, drops may be mixed with a small amount of milk/water and given immediately. Do not exceed the recommended dose.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
Take it as soon as you remember. If your next dose is almost due, skip the one you missed — never take two doses together to catch up.
An overdose of this medicine can raise blood calcium dangerously, causing thirst, frequent urination, vomiting, confusion and kidney damage. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Isi D3 DS are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Consult doctor |
|---|---|
| Breastfeeding | Generally considered safe while breastfeeding. |
| Alcohol | Use with caution |
| Driving | Not expected to affect your ability to drive. |
| Kidney | Consult your doctor if you have kidney disease. |
| Liver | No dose change is usually needed in liver disease. |
| Habit forming | No |
Do not use excessive doses—risk of hypervitaminosis D and hypercalcaemia. Use with caution in kidney disease, history of kidney stones, hyperparathyroidism, sarcoidosis or other granulomatous diseases. Monitor serum calcium/vitamin D levels if using high doses or long-term. Seek medical advice if symptoms of high calcium occur (persistent nausea, vomiting, confusion, excessive thirst/urination).
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people with a high blood calcium level, or with certain kidney stones.
Thiazide diuretics (increased risk of hypercalcaemia), digoxin/cardiac glycosides (arrhythmia risk with high calcium), antiepileptics like phenytoin/carbamazepine and rifampicin (reduced vitamin D effect), corticosteroids (reduced vitamin D action), cholestyramine/orlistat/mineral oil (reduced absorption), aluminium/magnesium antacids in renal impairment (risk of toxicity)
Store below 25°C in a cool, dry place. Protect from light and moisture. Keep bottle tightly closed and out of reach of children.
Take calcium with food, and split the day's total if you take a large amount. Sunlight helps your body make its own vitamin D. Have your level rechecked as your doctor advises rather than continuing high doses indefinitely.

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The information on Isi D3 DS 800 IU Drops is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.