Berotralstat
Severe
Database
Drug interaction classified as: absorption
Source: DDInter
Drug reference
Ulipristal Acetate
Progestogen · Emergency contraception
Also known as ella, ellaOne
ProgestogenEmergency contraception
CDSCO approvedSchedule H
EXCRETION
—
not curated
INTERACTIONS
4 major
SEVERE in our sources
PREGNANCY
—
not curated
Top interactions
- BerotralstatSevereDatabaseDDInter
- ColchicineSevereDatabaseDDInter
- EdoxabanSevereDatabaseDDInter
- VenetoclaxSevereDatabaseDDInter
Mechanism
Ulipristal acetate acts as a partial agonist at the progesterone receptor. For emergency contraception, its mechanism primarily involves delaying or preventing ovulation, likely through actions on the hypothalamus.
Indications
Emergency contraception
Dosing
- Adult
- 30 mg for 1 dose, to be taken as soon as possible after coitus, but no later than after 120 hours
- Max dose
- 30 mg as a single dose
Side effects
Common
Back painBreast tendernessDizzinessFatigueGastrointestinal discomfortHeadachesMenstrual cycle irregularitiesMood alteredMyalgiaNauseaPelvic painVomitingheadache (self-limited)abdominal pain
Drug interactions
Colchicine
Severe
Database
Drug interaction classified as: excretion
Source: DDInter
Edoxaban
Severe
Database
Clinical effect not specified
Source: DDInter
Venetoclax
Severe
Database
Clinical effect not specified
Source: DDInter
8 additional low-confidence interactions hidden — those rows lack a documented mechanism or management plan in our sources.
Related guidelines
Other Progestogen drugs
Ask House about Ulipristal Acetate
Continue into a citation-backed clinical answer with the drug context already attached.
Sources: Goodman & Gilman 14e, BNF·Verified: 2026-05-10 · House clinical team