Trazodone vs Levothyroxine: side-by-side comparison
Trazodone (Atypical antidepressant / serotonin modulator) and Levothyroxine (Thyroid hormone replacement) 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 | Trazodone | Levothyroxine |
|---|---|---|
| Therapeutic class | Atypical antidepressant / serotonin modulator | Thyroid hormone replacement |
| CAS | 19794-93-5 | 51-48-9 |
| ATC | N06AX05 | H03AA01 |
| Molecular weight | 371.86 g/mol | 776.87 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Trazodone and Levothyroxine 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
Trazodone acts by a different mechanism than Levothyroxine, 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
Trazodone: La trazodone est classée parmi les antagonistes des récepteurs de la sérotonine et inhibiteurs de sa recapture (SARI). Levothyroxine: La lévothyroxine remplace la thyroxine endogène déficitaire, convertie dans les tissus en hormone active, la triiodothyronine (T3), par les enzymes désiodases.
Indications compared
Trazodone: La trazodone est autorisée dans la dépression caractérisée. Levothyroxine: La lévothyroxine est autorisée dans l'hypothyroïdie de toute cause (thyroïdite de Hashimoto, post-thyroïdectomie, post-iode radioactif, congénitale), dans le goitre et dans la freination de la TSH après cancer thyroïdien…
Safety profile
Trazodone: Les effets indésirables fréquents sont la sédation (effet recherché à faible dose), la sécheresse buccale, les vertiges, l'hypotension orthostatique et les céphalées. Levothyroxine: À dose correcte, la lévothyroxine entraîne peu d'effets indésirables, puisqu'elle remplace une hormone normalement produite par l'organisme.
Questions fréquentes
Is Trazodone better than Levothyroxine? ▾
Trazodone and Levothyroxine are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Trazodone and Levothyroxine 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 Trazodone
Products with Levothyroxine
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