Do not take this medicine with any of the following medications:

-alcohol or any product that contains alcohol
-cisapride
-disulfiram
-dronedarone
-pimozide
-thioridazine

This medicine may also interact with the following medications:

-amiodarone
-birth control pills
-busulfan
-carbamazepine
-cimetidine
-cyclosporine
-fluorouracil
-lithium
-other medicines that prolong the QT interval (cause an abnormal heart rhythm) like dofetilide, ziprasidone
-phenobarbital
-phenytoin
-quinidine
-tacrolimus
-vecuronium
-warfarin

They need to know if you have any of these conditions:

-Cockayne syndrome
-history of blood diseases, like sickle cell disease or leukemia
-history of yeast infection
-if you often drink alcohol
-liver disease
-an unusual or allergic reaction to metronidazole, nitroimidazoles, parabens, or other medicines, foods, dyes, or preservatives
-pregnant or trying to get pregnant
-breast-feeding

Tell your doctor or health care professional if your symptoms do not improve or if they get worse.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.

Ask your doctor or health care professional if you should avoid alcohol. Many nonprescription cough and cold products contain alcohol. Metronidazole can cause an unpleasant reaction when taken with alcohol. The reaction includes flushing, headache, nausea, vomiting, sweating, and increased thirst. The reaction can last from 30 minutes to several hours.

If you are being treated for a sexually transmitted disease, avoid sexual contact until you have finished your treatment. Your sexual partner may also need treatment.

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Do not freeze. Throw away any unused medicine after the expiration date.