Diclofenac vs Cetirizine: side-by-side comparison
Diclofenac (NSAID (phenylacetic acid)) and Cetirizine (Second-generation H1 antihistamine) 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 | Diclofenac | Cetirizine |
|---|---|---|
| Therapeutic class | NSAID (phenylacetic acid) | Second-generation H1 antihistamine |
| CAS | 15307-86-5 | 83881-51-0 |
| ATC | M01AB05 | R06AE07 |
| Molecular weight | 296.15 g/mol | 388.89 g/mol |
| Brands with this active ingredient | 1 | 1 |
What they share
Diclofenac and Cetirizine 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
Diclofenac acts by a different mechanism than Cetirizine, 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
Diclofenac: Diclofenac hemmt reversibel die Cyclooxygenasen COX-1 und COX-2, mit etwas stärkerer COX-2-Selektivität als Ibuprofen und Naproxen. Cetirizine: Cetirizin blockiert selektiv periphere H1-Histaminrezeptoren und antagonisiert die Wirkungen des aus Mastzellen freigesetzten Histamins bei allergischen Reaktionen.
Indications compared
Diclofenac: Diclofenac ist bei Erwachsenen zur Behandlung von Arthrose, rheumatoider Arthritis, ankylosierender Spondylitis, akuten muskuloskelettalen Schmerzen, postoperativen Schmerzen, primärer Dysmenorrhoe, akuter Migräne und Ur… Cetirizine: Cetirizin ist bei Erwachsenen und Kindern zur Behandlung von allergischer Rhinitis (saisonal und perennial), allergischer Konjunktivitis sowie chronischer idiopathischer Urtikaria zugelassen.
Safety profile
Diclofenac: Häufige Nebenwirkungen sind gastrointestinale Beschwerden, Kopfschmerzen, Schwindel und erhöhte Leberenzyme. Cetirizine: Cetirizin wird im Allgemeinen gut vertragen.
Häufig gestellte Fragen
Is Diclofenac better than Cetirizine? ▾
Diclofenac and Cetirizine are not "better or worse" — they treat different things. The sensible question is which fits your specific need.
Can Diclofenac and Cetirizine 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 Diclofenac
Products with Cetirizine
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