Loratadine vs Avanafil: side-by-side comparison
Loratadine (Second-generation H1 antihistamine) and Avanafil (Phosphodiesterase type 5 (PDE5) inhibitor) 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 | Loratadine | Avanafil |
|---|---|---|
| Therapeutic class | Second-generation H1 antihistamine | Phosphodiesterase type 5 (PDE5) inhibitor |
| CAS | 79794-75-5 | 330784-47-9 |
| ATC | R06AX13 | G04BE10 |
| Molecular weight | 382.88 g/mol | 483.95 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Loratadine and Avanafil 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
Loratadine acts by a different mechanism than Avanafil, 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
Loratadine: Loratadine selectively blocks peripheral H1 histamine receptors, antagonising the effects of histamine released during allergic reactions. Avanafil: Avanafil selectively inhibits phosphodiesterase type 5 (PDE5) in the corpus cavernosum, increasing cGMP and enhancing nitric-oxide-mediated vasodilation in response to sexual stimulation.
Indications compared
Loratadine: Loratadine is approved in adults and children for the treatment of allergic rhinitis, including seasonal and perennial forms, and chronic idiopathic urticaria. Avanafil: Avanafil is approved for erectile dysfunction in adult men.
Safety profile
Loratadine: Loratadine is generally very well tolerated. Avanafil: The most common adverse effects are headache, flushing, nasal congestion and back pain — typical of the PDE5 class but generally less frequent than with older agents.
Frequently asked questions
Is Loratadine better than Avanafil? ▾
Loratadine and Avanafil are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Loratadine and Avanafil 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 Loratadine
Products with Avanafil
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.