Diflucan vs Tamiflu: side-by-side comparison
Diflucan (Antifungal Medications) and Tamiflu (Antiviral Medications) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Diflucan | Tamiflu |
|---|---|---|
| Active ingredient | Fluconazole | Oseltamivir |
| Manufacturer | Pfizer | Roche |
| Class | Antifungal Medications | Antiviral Medications |
| Strengths | 50mg, 100mg, 150mg, 200mg | 30mg, 45mg, 75mg |
| Forms | capsule, oral suspension | capsule, oral suspension |
What's the same
Diflucan and Tamiflu are used in very different patients, and the points in common are limited. The main shared element is that both meet regulatory standards for efficacy and safety and benefit from pharmacist oversight.
Key differences
Diflucan belongs to Antifungal Medications while Tamiflu belongs to Antiviral Medications. Indications, mechanisms and target populations differ. The comparison is most useful when a clinician has mentioned both medications and the patient wants to understand where each fits.
Mechanism and action
Diflucan: Fluconazole is a triazole antifungal that inhibits the cytochrome P450-dependent enzyme lanosterol 14-alpha-demethylase, blocking the synthesis of ergosterol from lanosterol. Tamiflu: Oseltamivir is a prodrug rapidly hydrolysed by hepatic esterases to the active metabolite oseltamivir carboxylate, which selectively inhibits the neuraminidase enzyme on the surface of influenza A and B viruses.
When Diflucan is preferred
Diflucan is approved in adults and children for the treatment of vulvovaginal candidiasis, oropharyngeal and oesophageal candidiasis, urinary tract candidiasis, peritonitis and other invasive candidiasis caused by susceptible species, including candidaemia, and for cryptococcal m…
When Tamiflu is preferred
Tamiflu is approved in adults and children for the treatment of acute uncomplicated influenza A and B when started within 48 hours of symptom onset, and for post-exposure prophylaxis of influenza A and B in patients aged 1 year and older.
Frequently asked questions
Is Diflucan or Tamiflu better? ▾
Diflucan and Tamiflu are not interchangeable — they treat different conditions. Asking which is "better" is meaningful only when a clinician has weighed both for the same specific clinical scenario.
Can I switch from Diflucan to Tamiflu? ▾
Switching between Diflucan and Tamiflu is rarely an appropriate decision since they belong to different classes and treat different conditions. The real question is usually whether the diagnosis calls for one medication or the other — which the prescriber resolves.
Do Diflucan and Tamiflu have the same side effects? ▾
No — they belong to different classes and have distinct side-effect profiles. Each medication has its own prescribing information.
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.