TheraRadar
Data updated: May 26, 2026

DRISDOL (ergocalciferol)

Endocrine Approved 1941-01-11

DRISDOL is indicated for the treatment of Hypoparathyroidism; Rickets; Familial Hypophosphatemia.

Source: FDA Label • ESJAY PHARMA
1
Indication
--
Phase 3 Trials
85
Years on Market

Details

Status
Prescription
First Approved
1941-01-11
Routes
ORAL
Dosage Forms
CAPSULE

Companies

Active Ingredient: ERGOCALCIFEROL

DRISDOL Approval History

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Original
New Indication
New Form
Label Update
15 FDA actions from 1941 to 2003
Nov 2003 SUPPL
Label · Labeling
Apr 1992 SUPPL
Mfg · Manufacturing (CMC)
Mar 1990 SUPPL
Mfg · Manufacturing (CMC)

What DRISDOL Treats

3 indications

DRISDOL is approved for 3 conditions since its original approval in 1941. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Hypoparathyroidism
  • Rickets
  • Familial Hypophosphatemia
Source: FDA Label

DRISDOL Competitive Set

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Indication competitors

4

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to DRISDOL

3 of 4

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

CALCITRIOL
CALCITRIOL
1 shared
SAGENT PHARMS
Shared indications:
Hypoparathyroidism
NATPARA
PARATHYROID HORMONE
1 shared
NPS PHARMS INC
Shared indications:
Hypoparathyroidism
ROCALTROL
CALCITRIOL
1 shared
ESJAY PHARMA
Shared indications:
Hypoparathyroidism
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Clinical Trial Registry

9 trials
Trial Sponsor ID Phase Status Title
NCT05619289 22-1310 K23AT011389-01A1 Ph 2 completed Immune Mechanisms of Vitamin D to Reduce Chronic Pain After Burn
NCT03621553 STU 062010-055 Ph 4 recruiting Vitamin D Homeostasis in Sarcoidosis
NCT03046927 PCR results posted H00010550 1R21DK113353 Ph 2, Ph 3 completed Vitamin D and Residual Beta-Cell Function in Type 1 Diabetes
NCT01568255 results posted 23187 Ph 4 completed Is Treatment of Vitamin D Deficiency Associated With Resolution of Statin-Induced Muscular Symptoms
NCT01173848 UPGRADE results posted Cleveland Clinic Ph 3 terminated Vitamin D Supplement Study for Stage Three and Four Chronic Kidney Disease (CKD) Patients
NCT02011828 IRB_00032685 Ph 1 completed Ergocalciferol Therapy in Calcidiol Deficient, Hemodialysis Patients on Therapeutic Doses of Paricalcitol
NCT01312441 00741 10-023 Ph 4 terminated Sustainability of Vitamin D Levels After Repletion With Ergocalciferol In Chronic Kidney Disease Stage 5D
NCT01295879 results posted AAAF3346 Ph 4 completed Vitamin D Repletion in Stone Formers With Hypercalciuria
NCT00958451 CK0023 Ph 4 completed Vitamin D Deficiency in Chronic Kidney Disease (CKD) Patients
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Active Pipeline

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Key Completed Trials

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Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

DRISDOL FDA Label Details

Indications & Usage

DRISDOL is indicated for the treatment of Hypoparathyroidism; Rickets; Familial Hypophosphatemia.

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.