Calcifediol
Severe
Database
Clinical effect not specified
Source: DDInter
Drug reference
Ergocalciferol
Vitamin · Vitamin D supplement
Also known as calciferol, vitamin D2
VitaminVitamin D supplement
CDSCO approved
EXCRETION
—
not curated
INTERACTIONS
7 major
SEVERE in our sources
PREGNANCY
—
not curated
Top interactionssee all 7 →
- CalcifediolSevereDatabaseDDInter
- CalcitriolSevereDatabaseDDInter
- CholecalciferolSevereDatabaseDDInter
- DihydrotachysterolSevereDatabaseDDInter
Mechanism
Ergocalciferol, a form of Vitamin D, is a hormone that plays an active role in calcium homeostasis. Its biological actions are mediated by the vitamin D receptor (VDR), a nuclear receptor. It permits efficient absorption of dietary calcium and allows full expression of the actions of Parathyroid Hormone (PTH).
Indications
Prevention of ricketsTreatment of ricketsPrevention of vitamin D deficiencyTreatment of vitamin D deficiencyfamilial hypophosphatemiahypoparathyroidismvitamin D–resistant rickets type IInutritional ricketsmetabolic ricketsosteoporosis (prevention and treatment)
Dosing
- Adult
- Daily by mouth for prevention and treatment of vitamin D deficiency; higher doses may be necessary for severe deficiency. Also, 20 units/mL as part of Vitlipid N Adult emulsion for injection.
Pharmacokinetics
Metabolism
Requires hydroxylation by the kidney to its active form; requires further processing in the body to become active.
Side effects
Serious
- hypercalcemia
Drug interactions
Calcitriol
Severe
Database
Drug interaction classified as: synergy.
Source: DDInter
Cholecalciferol
Severe
Database
Clinical effect not specified
Source: DDInter
Dihydrotachysterol
Severe
Database
Clinical effect not specified
Source: DDInter
Doxercalciferol
Severe
Database
Clinical effect not specified
Source: DDInter
Erdafitinib
Severe
Database
Clinical effect not specified
Source: DDInter
Paricalcitol
Severe
Database
Drug interaction classified as: synergy
Source: DDInter
5 additional unreviewed or low-confidence interactions hidden because their provenance or source detail is insufficient.
Related guidelines
Iron deficiency anaemia in pregnancy
ICMR · Obstetrics & Gynaecology · 2022
Iron deficiency anaemia in adults
ICMR · Hematology · 2023
Iron deficiency anaemia in pregnancy
FOGSI · Obstetrics & Gynaecology · 2017
Stroke and TIA — secondary prevention
AHA · Neurology · 2021
Tobacco-related cancer prevention
ICMR · Oncology · 2021
Other Vitamin drugs
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Textbook-sourced·Sources: Goodman & Gilman 14e, Katzung, BNF, Nelson·Updated: 2026-05-10