category B. This drug may not harm an unborn baby. However, talk to your doctor first before taking this medication if you are pregnant. This medication is known to pass in breast milk and may cause harm to a nursing infant. Talk to your doctor first before taking this drug if you are breast-feeding a baby.
Flagyl Intake Guidelines

Follow the exact direction given to you by your doctor in taking Flagyl. In case you did not understand the instruction, do not hesitate to ask your doctor, pharmacist or nurse to explain them to you. It is advisable to take every dose with a full glass of water. You may notice that your condition is improving even if the infection is not totally treated. You should take all the Flagyl that was prescribed by your doctor even if you feel better.
Flagyl Dosage

You may obtain the dose of Flagyl from your doctor. Follow the exact dose that your doctor will give you. The dose will vary from person to person. Do not change the dose given to you unless you are told by your doctor to do so.
Flagyl Overdose

Some of the signs of overdose with Flagyl are dizziness, nausea, vomiting, loss of coordination, numbness and tingling, and seizures. Look for emergency medical attention if you suspect or experience any of the said signs of overdose.
Flagyl Missed Dose

In case you miss a dose of this medication, take the missed dose as soon as you recall it. Take the remaining dose of the day in an equal time interval unless instructed by your doctor otherwise.
Flagyl Side Effects

Some of the serious side effects of Flagyl are allergic reaction such as shortness of breath, swelling of your lips, closing of your throat, or hives; numbness or tingling; seizures; dizziness or loss of coordination; and severe diarrhea. If you experience any of the said serious side effects, stop taking Flagyl and look for emergency medical attention. Some of the less serious side effects of Flagyl are unpleasant metallic taste in your mouth; headache; darkening of the urine; nausea, vomiting, or loss of appetite; constipation or mild diarrhea; and swollen or sore tongue. If you experience any of the said less serious side effects, you may still continue taking Flagyl but consult your doctor. Other side effects not mentioned here may also occur. Talk to your doctor if you experience any unusual or bothersome side effects.
Flagyl Drug Reactions

Talk to your doctor first before taking Flagyl if you are taking barbiturate like, amobarbital, or secobarbital; warfarin; phenytoin; or lithium. Other drugs not mentioned here may also affect Flagyl. Consult your doctor first before taking other prescriptions or over-the-counter medicines such as vitamins, minerals and herbal products.

Tell your prescriber or health care professional about all other medicines you are taking, including non-prescription medicines. Also tell your prescriber or health care professional if you are a frequent user of drinks with caffeine or alcohol, if you smoke, or if you use illegal drugs. These may affect the way your medicine works. Check with your health care professional before stopping or starting any of your medicines.

What side effects may I notice from taking metronidazole?
Side effects that you should report to your prescriber or health care professional as soon as possible:
Rare or uncommon:
•clumsiness, dizziness, or unsteadiness
•fever or chills, sore throat
•numbness, tingling, pain or weakness in the hands or feet
•seizures (convulsions)
•skin rash, itching
•vomiting or severe stomach pain
More common:
•unusual tiredness or weakness
•vaginal irritation or discharge

Side effects that usually do not require medical attention (report to your prescriber or health care professional if they continue or are bothersome):
•dark brown or reddish urine
•diarrhea
•dry mouth
•food tasting unusual or like metal
•headache
•loss of appetite
•nausea
•mild stomach pain or cramps

What should I watch for while taking metronidazole?
Tell your prescriber or health care professional if your symptoms do not improve in 2 or 3 days.

If you are taking this medicine for a long time you must visit your prescriber or health care professional for regular blood checks.

Avoid alcoholic drinks while you are taking metronidazole and for 3 days afterwards. Alcohol may make you dizzy, feel sick, and flushed; give you headaches and stomach pains.

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

Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water will help.