Fluconazole vs Levonorgestrel: side-by-side comparison
Fluconazole (Triazole antifungal) and Levonorgestrel (Synthetic progestin (emergency contraception)) belong to different therapeutic classes and are rarely substitutes for each other. The comparison is useful when a single patient is weighing both options for adjacent or overlapping needs.
| Property | Fluconazole | Levonorgestrel |
|---|---|---|
| Therapeutic class | Triazole antifungal | Synthetic progestin (emergency contraception) |
| CAS | 86386-73-4 | 797-63-7 |
| ATC | J02AC01 | G03AC03 |
| Molecular weight | 306.27 g/mol | 312.5 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Fluconazole and Levonorgestrel share the common regulatory framework for prescription active ingredients, bioequivalence standards for generics, and pharmacist oversight. Beyond that, points in common are limited.
Key differences
Fluconazole acts by a different mechanism than Levonorgestrel, with indications that barely overlap. Comparing the two is useful when a clinician has mentioned both in the same context or the patient wants to understand why one was prescribed instead of the other.
Mechanisms compared
Fluconazole: Le fluconazole est un antifongique triazolé qui inhibe la lanostérol 14-alpha-déméthylase, enzyme dépendante du cytochrome P450, bloquant la synthèse de l'ergostérol à partir du lanostérol. Levonorgestrel: En contraception d'urgence, le lévonorgestrel agit principalement en retardant ou en inhibant l'ovulation lorsqu'il est pris avant le pic de LH.
Indications compared
Fluconazole: Le fluconazole est autorisé chez l'adulte et l'enfant dans le traitement de la candidose vulvovaginale, des candidoses oropharyngée et œsophagienne, des candidoses urinaires, des péritonites et autres candidoses invasive… Levonorgestrel: Le lévonorgestrel est autorisé en contraception d'urgence (dose unique de 1,5 mg), en contraception orale régulière (associé à l'éthinylestradiol ou en progestatif seul), et comme principe actif des dispositifs intra-uté…
Safety profile
Fluconazole: Les effets indésirables fréquents comprennent céphalées, nausées et douleurs abdominales. Levonorgestrel: Les effets indésirables fréquents de la contraception d'urgence comprennent nausées, céphalées, fatigue, vertiges, tension mammaire et modifications du cycle menstruel.
Questions fréquentes
Is Fluconazole better than Levonorgestrel? ▾
Fluconazole and Levonorgestrel are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Fluconazole and Levonorgestrel be combined? ▾
Whether they can be combined depends on the indications and the interaction profile of each. If both are in a single prescription, the prescriber has weighed it; in self-medication they should never be combined.
Do they have the same side-effect profile? ▾
No — they belong to different classes and have distinct side-effect profiles. Each has its own prescribing information.
Products with Fluconazole
Products with Levonorgestrel
Les informations publiées sur ce site sont fournies à titre documentaire et pédagogique. Elles ne remplacent pas l'avis d'un professionnel de santé qualifié.