Metronidazole can cause side effects, though many people experience none. Common side effects include nausea, vomiting, and diarrhea. These usually resolve on their own. Less common, but potentially more serious, side effects exist.
Gastrointestinal Issues
- Metallic taste in the mouth: This is a frequent complaint. It typically fades after treatment completion. Abdominal pain: If severe or persistent, contact your doctor. Loss of appetite: Monitor your food intake and consult your doctor if concerned.
Neurological Effects
- Headache: Over-the-counter pain relievers may help; persistent headaches warrant medical attention. Dizziness: Avoid driving or operating machinery until you know how the medication affects you. Seizures: This is rare, but a serious side effect requiring immediate medical help.
Other Potential Side Effects
Skin reactions: Rashes, itching, or hives. Stop taking the medication and seek medical advice immediately. Dark urine: This is sometimes reported; inform your doctor. Changes in blood counts: Regular blood tests may be necessary, especially with long-term use.
Metronidazole interacts with certain medications. Crucially, avoid alcohol consumption during treatment and for at least 24 hours after completing your course. Combining it with anticoagulants (blood thinners) or lithium may increase the risk of side effects. Always inform your doctor or pharmacist about all other medications, supplements, and herbal remedies you are taking.
When to Seek Medical Attention
Seek immediate medical help if you experience severe allergic reactions (difficulty breathing, swelling of the face, lips, tongue, or throat), severe abdominal pain, or neurological symptoms like seizures or severe dizziness. Always discuss any concerns with your healthcare provider.
