Metronidazole is an antibiotic which is effective against certain types of parasites and anaerobic bacteria. These anaerobic bacteria usually thrive in low oxygen environments, causing diseases in the liver, abdomen and pelvis. Similarly parasites like ameba and Giardia lamblia cause chronic diarrhea and abdominal pain in infected individuals. Metronidazole works by blocking some of the cell functions of these diseases causing microorganisms, which results in their demise.
 

It is always recommended that you do not drink alcohol while taking this medicine. Fast heartbeats, nausea, flushing and vomiting are known to occur when alcohol is ingested while taking metronidazole. Metronidazole is also not prescribed by doctors for women in early pregnancy because of the potential adverse effect of the medicine on unborn babies.  One can find extensive information on metronidazole over the internet. This medication is also widely available at both online as well as retail pharmacies. It is always recommended though that you take metronidazole only after consulting your doctor or pharmacist. You should always tell your doctor clearly about your medical history before you take metronidazole. You should also inform your doctor about any other medication that you may be already taking before you take this medication.

Metronidazole may cause some side effects. These include, upset stomach, diarrhea, vomiting, loss of appetite, dry mouth, dark or reddish brown urine, tongue irritation or numbness or tingling of feet or hand. If any of these symptoms were to be severe or persistent then you should immediately stop taking metronidazole. You should also seek immediate medical attention in such instances.