Dihydroergotamine

Clinical contraindication: None listed; No clinical contraindication identified.
Best available evidence: Mechanism only
Half-life: Not recorded

Named in state rules?

CONot named

ORNot named

NMPending

Cite asPsilodex: dihydroergotamine · v2026.10.02

Clinical data and state rules are separate facts. Both are shown; neither is a decision.

01 Interaction with psilocybin

Serotonin-receptor agonist; vasoconstriction adds to psilocybin's BP rise.

Human data with psilocybin: None known: no published human data with psilocybin

Evidence types on this record

ThMechanism only (theoretical)

2 listed · counted on reports

Raises blood pressure or heart rate: Raises blood pressure or heart rate. Psilocybin raises both for several hours, so the effects can add. Sources [1]
Serotonergic: Increases serotonin activity, for example by blocking its reuptake or releasing it. Psilocybin acts on serotonin receptors, so effects can add together. With antidepressant use, the psilocybin response can be weaker. Sources [2]

Plain-language summary · official text governs

CO4 CCR 755-1

Not named

No provision names this medication or its class.

Colorado · checked 2026-09-30

OROAR 333-333

Not named

No provision names this medication or its class.

Oregon · checked 2026-09-30

NM7.35.3 NMAC (proposed)

Pending

New Mexico's clinical rules (proposed 7.35.3 NMAC) are not final. No provision naming this medication has been found.

New Mexico · checked 2026-09-30

None linked

No condition named in state rules is linked to this medication.

Trudhesa (Dihydroergotamine Mesylate) Spray, Metered · FDA label (DailyMed)
Preston CL (ed). Stockley’s Drug Interactions, 11th ed. Pharmaceutical Press, 2016., p. 652