Chemical formula: C₂₁H₂₈O₂ Molecular mass: 312.446 g/mol PubChem compound: 13109
The precise mode of action of levonorgestrel as an emergency contraceptive is not known. At the recommended regimen, levonorgestrel is thought to work mainly by preventing ovulation and fertilisation if intercourse has taken place in the preovulatory phase, when the likelihood of fertilisation is the highest.
This medicinal substance has been classified in the anatomical therapeutic chemical (ATC) classification according to its main therapeutic use as follows:
| ATC code | Group title | Classification |
|---|---|---|
| G03AC03 | Levonorgestrel | G Genito urinary system and sex hormones → G03 Sex hormones and modulators of the genital system → G03A Hormonal contraceptives for systemic use → G03AC Progestogens |
| G03AD01 | Levonorgestrel | G Genito urinary system and sex hormones → G03 Sex hormones and modulators of the genital system → G03A Hormonal contraceptives for systemic use → G03AD Emergency contraceptives |
Competent medicine agencies globally have authorized commercialization of this active ingredient according to these medication package inserts (MPIs):
| Title | Information Source | Document Type | |
|---|---|---|---|
| EMERRES Tablet | Medicines & Healthcare Products Regulatory Agency (GB) | MPI, EU: SmPC | |
| JAYDESS Intrauterine delivery system | Medicines & Healthcare Products Regulatory Agency (GB) | MPI, EU: SmPC |
Levonorgestrel is an active ingredient of these brands:
United States (US)
Australia (AU)Austria (AT)
Brazil (BR)
Canada (CA)Ecuador (EC)
Estonia (EE)Finland (FI)France (FR)
Germany (DE)
Hong Kong (HK)Ireland (IE)Japan (JP)Lithuania (LT)Malta (MT)
Netherlands (NL)
New Zealand (NZ)Nigeria (NG)
Poland (PL)Romania (RO)
Singapore (SG)
South Africa (ZA)Spain (ES)
Tunisia (TN)
Turkey (TR)United Kingdom (UK)
Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide. |
© All content on this website, including data entry, data processing, decision support tools, "RxReasoner" logo and graphics, is the intellectual property of RxReasoner and is protected by copyright laws. Unauthorized reproduction or distribution of any part of this content without explicit written permission from RxReasoner is strictly prohibited. Any third-party content used on this site is acknowledged and utilized under fair use principles.
