SIDE EFFECTS: Stomach discomfort, headache, or dizziness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. Vaginal discomfort/itching/discharge may occur or worsen. These symptoms may be due to a new vaginal infection (such as a yeast/fungal infection). Contact your doctor if you notice a change in vaginal discharge or other new vaginal symptoms. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Stop using this medication and get medical help right away if you have any very serious side effects, including: numbness/tingling of the hands/feet, seizures. A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

PRECAUTIONS: Before using metronidazole, tell your doctor or pharmacist if you are allergic to it; or to other nitroimidazole antibiotics (such as tinidazole); or if you have any other allergies. This product may contain inactive ingredients (such as paraben preservatives), which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: nervous system disorders (such as seizures, numbness/tingling of the hands/feet), liver disease. This drug may make you dizzy. Alcohol or marijuana can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Talk to your doctor if you are using marijuana. Do not drink alcohol while using this medication and for at least 24 hours after stopping this medication. Drinking alcohol while using this medication may cause stomach cramps, flushing, nausea, vomiting, and headache. Do not have vaginal sex or use tampons or douches while using this medication. During pregnancy, this medication should be used only when clearly needed. Antibiotics taken by mouth have been used to treat vaginal infections during pregnancy, especially high-risk pregnancies (for example, if there is a risk of early childbirth). Consult your doctor for more details and to discuss the risks and benefits. The medication in this product may pass into breast milk in small amounts. Consult your doctor before breast-feeding.

DRUG INTERACTIONS: See also Precautions section. Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Do not use this medication if you have taken disulfiram within the last 2 weeks. Do not take products containing alcohol or propylene glycol while using this medication and for at least 24 hours after stopping this medication. Ask your pharmacist for more details. This product may interfere with certain laboratory tests, possibly causing false test results. Make sure laboratory personnel and all your doctors know you use this drug.

OVERDOSE: This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.