How to Take Flagyl

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If you are trying to overcome a bacterial infection, especially of the reproductive system, vagina, skin or GI tract, your doctor may prescribe Flagyl. Flagyl is an antibiotic (not used to treat viral infections) which contains metronidazole. This medication is extremely potent and can overwhelm and destroy most infections. Being as that is the case though, it can also overwhelm you if you don’t follow all the precautions. How do you take Flagyl?

Your doctor will tell you how many times a day and for how long you need to use Flagyl. You will most likely be taking Flagyl two or three times a day for five to ten days. There may be exceptions though; for particularly stubborn bacterial strains, you may need to stay on Flagyl for a couple of weeks. Even if you are told to take Flagyl for a long time, you should follow through on the full round. Feeling better doesn’t necessarily mean you are better, so if you’re partway through the course and start feeling like your infection is gone, keep taking the Flagyl to make sure the bacteria really are wiped out. Note though that if you are told to use Flagyl for a long time period, there is a chance you’ll develop a new yeast infection or oral thrush infection. Keep alert for signs of new infection and report anything to your doctor which seems awry.

Part of knowing how to take Flagyl is knowing what precautions to follow before you start and while you’re on the medication. One precaution is to alert your doctor to any known allergies you have. If you are allergic to any active or inactive ingredient in Flagyl, you could have an adverse reaction to the medication. You should also let your physician know if you have or have had Chron’s disease, nervous system disorders, seizures, blood disorders or liver disease at any time in the past. These conditions can interfere with the medication and cause problems. Other medications (particularly disulfiram or blood thinners) can also cause dangerous drug interactions. If you are pregnant or breast-feeding you shouldn’t be using Flagyl. Women who are breast-feeding can temporarily switch to using a formula while taking Flagyl. It is important to make sure that the Flagyl is out of your system before you return to breast-feeding, though. You should not drink while using Flagyl, and should also wait several days to resume after your course is finished. Alcohol reacts with Flagyl and can cause severe cramps, nausea, vomiting, headache, and flushing.


Dizziness is one of the most common side effects of Flagyl. Most people feel they can still operate machinery and drive while using Flagyl, but if you do not feel like you can manage it, you should take a break. It is dangerous to drive or operate machinery when you are not feeling up to it, but otherwise this dizziness is a harmless side effect. Used properly, Flagyl is a very effective antibiotic which should get you back to full health fairly quickly.