Flagyl 400 vs metrogyl 400?

Short answer: Flagyl 400 and Metrogyl 400 are basically the same thing. Both are metronidazole 400 mg tablets. Flagyl is a brand name; Metrogyl is another brand name used in different regions. The active ingredient and strength are the same, so they’re generally interchangeable.

What can differ
- Inactive ingredients (binders, color, coating) and packaging
- Price or availability in your area
- The exact dosing schedule should come from your prescription (brand vs generic doesn’t usually change the dose)

Dosing (typical for adults)
- Commonly 400–500 mg every 8 hours (or 500 mg every 8 hours, depending on the infection). If you’re taking a 400 mg tablet, your clinician will specify how many tablets and how often.
- Always follow the exact dose prescribed by your doctor or the instructions on the label.

Safety notes
- Do not drink alcohol during treatment and for at least 48 hours after finishing the course (disulfiram-like reaction can occur).
- Tell your clinician about liver disease, pregnancy (especially first trimester), or if you’re breastfeeding.
- Metronidazole can interact with alcohol, warfarin, and some other meds; tell your pharmacist about all medicines you take.
- Common side effects: nausea, a metallic taste, loss of appetite, headache. Serious side effects are rare but contact a clinician if you have severe allergic reactions, persistent vomiting, or numbness/tingling of hands/feet.

If you want to substitute one for the other, it’s usually fine to switch brands as long as the strength (400 mg) and form (oral tablet) are the same. If you’re in the middle of a prescribed course, confirm with your doctor or pharmacist before switching brands.

If you share your country or the exact dose your prescription specifies, I can give more specific guidance.