Duloxetine vs Levonorgestrel: side-by-side comparison
Duloxetine (Serotonin-norepinephrine reuptake inhibitor (SNRI)) 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 | Duloxetine | Levonorgestrel |
|---|---|---|
| Therapeutic class | Serotonin-norepinephrine reuptake inhibitor (SNRI) | Synthetic progestin (emergency contraception) |
| CAS | 116539-59-4 | 797-63-7 |
| ATC | N06AX21 | G03AC03 |
| Molecular weight | 297.41 g/mol | 312.5 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Duloxetine 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
Duloxetine 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
Duloxetine: La duloxétine inhibe la recapture synaptique de la sérotonine et de la noradrénaline, avec un effet plus faible sur la dopamine. 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
Duloxetine: La duloxétine est autorisée dans la dépression caractérisée, le trouble anxieux généralisé, les douleurs neuropathiques périphériques diabétiques, la fibromyalgie, les douleurs musculosquelettiques chroniques (lombalgies… 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
Duloxetine: Les effets indésirables fréquents comprennent nausées (surtout les 1 à 2 premières semaines), sécheresse buccale, céphalées, fatigue, troubles du sommeil et troubles de la fonction sexuelle. 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 Duloxetine better than Levonorgestrel? ▾
Duloxetine and Levonorgestrel are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Duloxetine 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 Duloxetine
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.