Who are Drisdol's main competitors?

Direct comparators (same drug class / molecular target / therapeutic area): Rocaltrol, Vitamin D3, Ergocalciferol Capsules, Vitamin D2.

How often does this brief refresh?

Every 30 minutes from primary sources (FDA, EMA, MHRA, PMDA, ClinicalTrials.gov, USPTO). Subscribe to the RSS feed below for push alerts.

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Last reviewed 2026-05-13 · How we verify

Drisdol — Competitive Intelligence Brief

Drisdol (ERGOCALCIFEROL) competitive landscape: 4 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: Provitamin D2 Compound [EPC]. Area: Metabolic.

marketed Provitamin D2 Compound [EPC] 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial Metabolic Small molecule Live · refreshed every 30 min

Target snapshot

Drisdol (ERGOCALCIFEROL) — Esjay Pharma.

Comparator set (4 drugs)

Auto-detected by same drug class / molecular target / therapeutic area, ranked by phase + recency. Override with ?vs=slug1,slug2,….

Drug	Generic	Sponsor	Phase	Class	Target	Approval / PDUFA
Drisdol TARGET	ERGOCALCIFEROL	Esjay Pharma	marketed	Provitamin D2 Compound [EPC]	25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial	1941-01-01
Rocaltrol	Rocaltrol	Shandong University	marketed		Vitamin D 25-hydroxylase, 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial, Vitamin D-binding protein
Vitamin D3	cholecalciferol		marketed	Vitamin C [EPC]	Vitamin D 25-hydroxylase, 25-hydroxyvitamin D-1 alpha hydroxylase, mitochondrial, Sterol 26-hydroxylase, mitochondrial
Ergocalciferol Capsules	Ergocalciferol Capsules	University of Texas Southwestern Medical Center	marketed	Provitamin D2 Compound [EPC]
Vitamin D2	Vitamin D2	Wenhu Liu	marketed	Provitamin D2 Compound [EPC]

Recent regulatory actions (last 90 days)

No regulatory actions in the last 90 days for this set.

Upcoming PDUFA dates (next 180 days)

No PDUFA dates in the next 180 days for this set.

Patent timeline (forward window)

No upcoming patent expiries for this set.

Sponsor landscape (Provitamin D2 Compound [EPC] class)

Esjay Pharma · 1 drug in this class
University of Texas Southwestern Medical Center · 1 drug in this class
Wenhu Liu · 1 drug in this class

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Cite this brief

Drug Landscape (2026). Drisdol — Competitive Intelligence Brief. https://druglandscape.com/ci/ergocalciferol. Accessed 2026-05-13.

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