What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. Check your heart rate and blood pressure regularly while you are taking this medicine. Ask your doctor or health care professional what your heart rate should be and when you should contact him or her.
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. To avoid dizzy or fainting spells, do not stand or sit up quickly. Alcohol can make you more drowsy and dizzy. Avoid alcoholic drinks.
Avoid becoming dehydrated or overheated.
Do not stop taking except on your doctor's advice. You may develop a severe reaction. Your doctor will tell you how much medicine to take.
Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water will help.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
swelling of the feet and lower legs
blistering, burning, crusting, dryness, or flaking of the skin
chest pain or discomfort
confusion as to time, place, or person
decreased urine output
dilated neck veins
fast, pounding, or irregular heartbeat or pulse
general feeling of discomfort or illness
holding false beliefs that cannot be changed by fact
itching, scaling, severe redness, soreness, or swelling of the skin
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
lightheadedness, dizziness, or fainting
paleness or cold feeling in the fingertips and toes
pounding, slow heartbeat
problems in urination or increase in the amount of urine
raised red swellings on the skin, lips, tongue, or in the throat
seeing or hearing things that are not there
shortness of breath
swelling of the face, fingers, feet, or lower legs
tightness in the chest
trouble with sleeping
unusual excitement, nervousness, or restlessness
unusual tiredness or weakness
vivid dreams or nightmares
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Dizziness (extreme) or faintness
pinpoint pupils of the eyes
unusual tiredness or weakness (extreme)
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Darkening of the skin
decreased sexual ability
dry, itching, or burning eyes
loss of appetite
nausea or vomiting
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.