What should I watch for?
Tell your doctor or health care professional if your symptoms do not start to get better or if they get worse.
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.
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 reduce the risk of dizzy and fainting spells, do not stand or sit up quickly, especially if you are an older patient. Alcohol may increase dizziness and drowsiness. Avoid alcoholic drinks.
If you are taking another medicine that also causes drowsiness, you may have more side effects. Give your health care provider a list of all medicines you use. Your doctor will tell you how much medicine to take. Do not take more medicine than directed. Call emergency for help if you have problems breathing or unusual sleepiness.
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:
Shakiness and unsteady walk
unsteadiness, trembling, or other problems with muscle control or coordination
Incidence not known
Abdominal or stomach pain
black, tarry stools
blistering, flaking, or peeling of the skin
changes in patterns and rhythms of speech
decrease in the frequency of urination
decrease in urine volume
difficulty in passing urine (dribbling)
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
false beliefs that cannot be changed by facts
fast or irregular breathing
feeling sad or empty
feeling that others are watching you or controlling your behavior
feeling that others can hear your thoughts
feeling, seeing, or hearing things that are not there
increased muscle spasms or tone
itching or rash
lack of memory of what takes place after a certain event
loss of appetite
loss of bladder control
loss of interest or pleasure
lower back or side pain
outbursts of anger
painful or difficult urination
ulcers, sores, or white spots in the mouth
unpleasant breath odor
unusual bleeding or bruising
unusual feeling of excitement
unusual tiredness or weakness
vomiting of blood
yellow eyes or skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Change in consciousness
difficult or troubled breathing
irregular, fast or slow, or shallow breathing
lack of coordination
loss of consciousness
loss of strength or energy
muscle pain or weakness
pale or blue lips, fingernails, or skin
unusual drowsiness, dullness, tiredness, weakness, or feeling of sluggishness
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:
Incidence not known
decreased interest in sexual intercourse
difficulty with swallowing
feeling of constant movement of self or surroundings
inability to have or keep an erection
increase in sexual ability, desire, drive, or performance
increased interest in sexual intercourse
increased watering of the mouth
loss of sexual ability, desire, drive, or performance
passing of gas
sensation of spinning
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.