Metronidazole

Prescription-only medicine · General · UK online pharmacy

Metronidazole is a widely used antibiotic effective in treating bacterial infections, including:

Key facts

• Classification: Prescription-only medicine (POM) in the UK
• Treatment category: General
• Price (if prescribed): from £13.49
• Typical supply: 7 days
• Availability: Available following an online consultation
• Prescriber review: every order is assessed by a GPhC-registered pharmacist

Metronidazole prices by dose and pack size

Prices correct as of 2026-08-21. The exact dose is confirmed during the clinical assessment.

Metronidazole: A Trusted Antibiotic for Infections

What is Metronidazole?

Metronidazole is a widely used antibiotic effective in treating bacterial infections, including:

• Trichomoniasis (a sexually transmitted infection).
• Bacterial vaginosis (BV).
• Skin infections.
• Digestive system infections.

It is available in various forms, including tablets, topical gels, and injections (for severe cases). Commonly sold under brand names like Flagyl and Zidoval, Metronidazole is an effective treatment for acute bacterial infections.

At Medihealth Direct, you can buy Metronidazole for BV or trichomoniasis after completing an online consultation.

What is Metronidazole Used For?

Metronidazole treats a range of bacterial and parasitic infections, including:

• Bacterial vaginosis (BV).
• Trichomoniasis (STI).
• Rosacea (topical gel).
• Peptic ulcers.
• Giardiasis (intestinal infection).
• Pelvic inflammatory disease (PID).
• Gum and dental infections.
• Amoebiasis (parasitic infection).
• Infected wounds or cuts.

For conditions beyond BV or trichomoniasis, consult your GP for guidance and prescriptions.

How Does Metronidazole Work?

Metronidazole stops bacterial cells from multiplying, helping your immune system clear the infection.

Key Mechanisms

1. Inhibits Bacterial Growth: Prevents bacteria from reproducing, halting infection spread.
2. Promotes Healing: Allows your body’s immune system to fight off bacteria effectively.

Most people notice symptom relief within a few days. However, completing the entire course is essential to avoid recurrence or resistance.

How to Use Metronidazole?

Tablets

• Dosage: 400mg twice daily for 5–7 days (BV or trichomoniasis).
• Instructions:
  • Take it with water after meals.
  • Swallow whole; do not chew or crush.
  • Do not drink alcohol while on Metronidazole.
  • If you miss a dose, take it as soon as you remember unless it’s near your next dose.
  • Avoid double doses.

Gel

For BV, apply Zidoval (Metronidazole gel) once daily for 5 consecutive days.

• Application Guide:

1. Wash your hands thoroughly.
2. Use the applicator to insert the gel into the vagina.
3. Discard the applicator after use.

Always follow the patient leaflet for detailed instructions.

Are There Possible Side Effects?

While most people tolerate Metronidazole well, some may experience mild side effects:

Common Side Effects

• Diarrhoea or constipation.
• Nausea or stomach pain.
• Metallic taste in the mouth.
• Loss of appetite.
• Vaginal thrush.

Rare Side Effects

• Allergic reactions (swelling or difficulty breathing).
• Tingling or numbness (peripheral neuropathy).

If side effects persist or worsen, consult your healthcare professional immediately.

Who Can Take Metronidazole?

Metronidazole is safe for most adults. However, consult your healthcare professional if you have:

• A history of allergic reactions to Metronidazole.
• Liver or kidney problems.
• Neurological disorders, such as epilepsy.
• Crohn’s disease or other inflammatory bowel conditions.

Interactions with Other Medications

Metronidazole may interact with:

• Blood thinners (e.g., warfarin).
• Lithium (mood stabiliser).
• Epilepsy medicines (e.g., phenobarbital).
• Cancer treatments.

Always inform your healthcare professional of any medications or supplements you are taking.

What Precautions Should I Take?

1. Avoid Alcohol: Drinking alcohol while taking Metronidazole may cause severe reactions, such as nausea, dizziness, and stomach pain. Wait at least 24 hours after your last dose before drinking.
2. Inform Recent Sexual Partners: If treating an STI like trichomoniasis, ensure your partner gets tested and treated.
3. Monitor for Long-Term Side Effects: Extended use of Metronidazole can cause nerve damage (e.g., tingling in hands or feet).

Can I Buy Metronidazole Online?

Yes, you can purchase Metronidazole online at Medihealth Direct.

Steps to Order

1. Online Consultation: Complete a brief medical form for healthcare professional review.
2. Prescription Approval: If suitable, your prescription will be processed.
3. Fast Delivery: Enjoy free next-day delivery in discreet packaging.

Metronidazole FAQs

Can Metronidazole Treat UTIs?

Metronidazole is not commonly used for urinary tract infections (UTIs). Other antibiotics like Trimethoprim or Nitrofurantoin are more suitable.

Can You Drink Alcohol on Metronidazole?

No. Drinking alcohol while on Metronidazole may cause nausea, headaches, and dizziness.

Does Metronidazole Cause Thrush?

Yes, it may increase the risk of oral or vaginal thrush in some people.

Can Metronidazole Affect Birth Control?

Metronidazole can reduce the effectiveness of combined contraceptive pills. Use additional barrier protection while on this treatment.

How Long Does Metronidazole Take to Work?

Metronidazole typically begins working within a few days. However, completing the entire course is essential for full recovery.

How does the online consultation for Metronidazole work?

1. Complete a confidential online health questionnaire.
2. A GPhC-registered pharmacist reviews your answers and confirms whether the treatment is clinically appropriate.
3. If approved, your medication is dispensed by the pharmacy and delivered in discreet packaging by tracked UK delivery.

See how the service works or browse all treatments.