Metronidazole Tablet: Infections It Treats And How To Take It Safely

Metronidazole tablet is a prescription medicine used to treat certain bacterial and parasitic infections. It is often advised for infections of the stomach, intestine, mouth, vagina, skin, and other body parts.

It is an antibiotic antiparasitic drug. This means it works against specific bacteria and parasites. It does not work for viral infections such as cold, flu, or most sore throats.

You should take metronidazole only when prescribed by your doctor. Taking antibiotics without medical advice can make infections harder to treat in the future.

What Is Metronidazole Tablet?

Metronidazole tablet belongs to a group of medicines called nitroimidazole antibiotics. It is used for anaerobic bacterial infection treatment and certain protozoal infections.

Anaerobic bacteria are bacteria that grow in places with little or no oxygen. These infections can affect areas such as the mouth, abdomen, pelvis, liver, bones, joints, and skin.

Metronidazole is available as tablets, capsules, oral liquid, injections, creams, gels, and vaginal preparations. This blog focuses mainly on oral metronidazole tablet.

How Metronidazole Works

Metronidazole enters susceptible bacteria and parasites and damages their DNA. This stops them from growing and multiplying. Over time, the infection starts to clear when the medicine is used correctly and the organism is sensitive to it.

It is important to complete the full course. Stopping early may allow the infection to return and can also contribute to antibiotic resistance.

Common Uses Of Metronidazole Tablet

Metronidazole tablet uses include treatment of:

• Bacterial vaginosis
• Trichomoniasis
• Amoebiasis
• Giardiasis
• Dental infections and gum infections
• Pelvic inflammatory disease, when advised with other medicines
• Intra-abdominal infections
• Certain skin and soft tissue infections
• Liver abscess linked to amoebic infection
• Some infections after surgery, when prescribed
• Certain gut infections, based on diagnosis

It may also be used with other medicines for some complex infections. Your doctor will decide the right treatment based on your symptoms, test results, and medical history.

When Do Doctors Prescribe Metronidazole?

Doctors may prescribe metronidazole when they suspect or confirm an infection caused by bacteria or parasites that respond to this medicine.

It may be prescribed when you have:

• Foul-smelling vaginal discharge due to bacterial vaginosis
• A confirmed sexually transmitted infection such as trichomoniasis
• Loose stools due to certain parasitic infections
• Dental abscess or gum infection
• Abdominal infection
• Pelvic infection
• Skin or wound infection involving anaerobic bacteria
• Amoebic infection of the intestine or liver

Metronidazole is not a general medicine for every infection. It should be used only for the right condition.

Metronidazole Tablet Dosage And How To Take It

Metronidazole tablet dosage depends on the type of infection, your age, your weight, your liver function, and other medicines you take.

General safety points include:

• Take it exactly as prescribed.
• Swallow the tablet with a glass of water.
• Take it at the same time each day.
• You may take it with or after food to reduce nausea.
• Do not crush or chew the tablet unless your doctor or pharmacist says it is safe.
• Complete the full course, even if you feel better.
• Do not share your antibiotic with anyone else.
• Do not take a double dose if you miss one.

If you miss a dose, take it when you remember. If it is almost time for your next dose, skip the missed dose and continue your normal schedule.

How Long Does Metronidazole Take To Work?

You may start feeling better within a few days. However, this depends on the infection being treated, its severity, and whether the organism is sensitive to metronidazole.

Some infections need a few days of treatment. Others may need a longer course or additional medicines. If your symptoms do not improve after a few days, or if they get worse, contact your doctor.

Benefits Of Metronidazole In Treating Infections

Metronidazole tablet benefits include:

• It treats selected bacterial and parasitic infections effectively.
• It is useful for anaerobic bacterial infection treatment.
• It can help reduce infection related pain, discharge, swelling, or stomach symptoms when used for the right diagnosis.
• It is available in different forms for different body areas.
• It may be combined with other medicines for broader infection control.

The benefit is highest when metronidazole is used after proper medical assessment.

Possible Side Effects Of Metronidazole Tablet

Metronidazole tablet side effects can vary from person to person.

Common side effects include:

• Nausea
• Vomiting
• Metallic taste in the mouth
• Dry mouth
• Headache
• Loss of appetite
• Stomach cramps
• Diarrhoea
• Constipation
• Dizziness

Serious side effects need urgent medical advice. These may include:

• Rash, itching, swelling, or breathing difficulty
• Numbness, tingling, or burning in the hands or feet
• Seizures
• Confusion or trouble speaking
• Loss of balance or poor coordination
• Severe or persistent diarrhoea
• Yellowing of the eyes or skin
• Dark urine
• Severe abdominal pain

If diarrhoea lasts more than a day, becomes watery, or contains blood, speak to your doctor. Your doctor can assess possible diarrhea causes and decide whether further testing is needed.

Who Should Avoid Metronidazole?

You should not take metronidazole without medical advice if you:

• Are allergic to metronidazole or similar medicines
• Have severe liver disease
• Have kidney disease
• Have a history of seizures or nerve problems
• Have blood disorders
• Have Cockayne syndrome
• Are pregnant or planning pregnancy
• Are breastfeeding
• Take disulfiram or have taken it recently
• Drink alcohol frequently
• Are taking medicines that may interact with metronidazole

Children should take metronidazole only when prescribed by a doctor.

Precautions And Drug Interactions

Tell your doctor about all medicines, supplements, and herbal products you take.

Metronidazole may interact with:

• Alcohol
• Disulfiram
• Warfarin and other blood thinners
• Lithium
• Phenytoin
• Phenobarbital
• Carbamazepine
• Cimetidine
• Some medicines that affect heart rhythm
• Some hormonal medicines

If you are being treated for a sexually transmitted infection, avoid sexual contact until treatment is complete and your doctor says it is safe. Your partner may also need treatment.

Alcohol Interaction Warning

Do not drink alcohol while taking metronidazole and for at least 48 to 72 hours after your last dose, or as advised by your doctor.

Alcohol can cause an unpleasant reaction with metronidazole. You may experience nausea, vomiting, stomach pain, headache, flushing, sweating, fast heartbeat, or dizziness.

Also check cough syrups, tonics, mouthwashes, and some liquid medicines, as some may contain alcohol.

When To See A Doctor

See a doctor if your symptoms do not improve, worsen, or return after treatment. You should also seek medical help if you develop severe diarrhoea, blood in stool, fever, abdominal swelling, persistent vomiting, dehydration, allergic symptoms, numbness, tingling, confusion, seizures, or yellowing of the skin or eyes.

Do not continue or repeat metronidazole on your own. Recurrent infections may need testing, a different medicine, or treatment for your partner.

Key Takeaways

• Metronidazole tablet is used for selected bacterial and parasitic infections.
• It does not treat viral infections such as cold or flu.
• Take it only with a doctor’s prescription.
• Complete the full course, even if you feel better.
• Avoid alcohol during treatment and for at least 48 to 72 hours after the last dose.
• Side effects may include nausea, metallic taste, headache, stomach cramps, and diarrhoea.
• Serious symptoms such as seizures, allergy, numbness, or severe diarrhoea need urgent medical advice.

Staying Informed About Your Health

Infections can have different causes, and the right treatment often depends on the right diagnosis. Tests such as stool examination, urine tests, vaginal swabs, blood tests, culture tests, and other infection markers can help your doctor choose the most suitable care.

Metropolis Healthcare supports preventive healthcare and timely diagnosis with 4,000+ tests, full body checkups, speciality testing, accurate reports, expert pathologists, and NABL and CAP accredited labs. You can book tests through the website, app, call, or WhatsApp. With home sample collection, quick turnaround time, and a strong network of 10,000 touchpoints, Metropolis makes a preventive health checkup and ongoing wellness monitoring simple and accessible.

FAQs About Metronidazole Tablet

What Is A Metronidazole Tablet Used For?

Metronidazole tablet is used to treat certain bacterial and parasitic infections. These may include bacterial vaginosis, trichomoniasis, amoebiasis, giardiasis, dental infections, pelvic infections, and some abdominal or skin infections.

Is Metronidazole A Tablet For Loose Motion?

Metronidazole is not a general tablet for all loose motion. It may be prescribed for diarrhoea caused by certain parasites or bacteria. Loose motion can have many causes, including viral infections, food poisoning, indigestion, or inflammatory conditions. Do not take metronidazole for loose motion unless your doctor advises it.

Is Metronidazole Given 3 Times A Day?

Sometimes, yes. Metronidazole may be given three times a day for some infections. However, the dose and schedule vary by condition. Some treatments use different dosing patterns. Follow your prescription exactly.

Is Metronidazole A Good Antibiotic?

Metronidazole is a useful antibiotic antiparasitic drug when used for the right infection. It is not suitable for every infection. Your doctor will decide whether it is appropriate based on your symptoms, examination, and test findings.

Can I Take Metronidazole With Alcohol?

No. Avoid alcohol while taking metronidazole and for at least 48 to 72 hours after your final dose. Alcohol may cause nausea, vomiting, stomach pain, flushing, headache, sweating, fast heartbeat, or dizziness.