What should I watch for?
Tell your doctor if your symptoms do not get better or if they get worse. Visit your doctor or health care professional for regular checks on your progress. Because it may take several weeks to see the full effects of this medicine, it is important to continue your treatment as prescribed by your doctor.
Patients and their families should watch out for new or worsening thoughts of suicide or depression. Also watch out for sudden changes in feelings such as feeling anxious, agitated, panicky, irritable, hostile, aggressive, impulsive, severely restless, overly excited and hyperactive, or not being able to sleep. If this happens, especially at the beginning of treatment or after a change in dose, call your health care professional.
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. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.
This medicine can cause an increase in blood pressure. This medicine can also cause a sudden drop in your blood pressure, which may make you feel faint and increase the chance of a fall. These effects are most common when you first start the medicine or when the dose is increased, or during use of other medicines that can cause a sudden drop in blood pressure. Check with your doctor for instructions on monitoring your blood pressure while taking this medicine.
Your mouth may get dry. Chewing sugarless gum or sucking hard candy, and drinking plenty of water may help. Contact your doctor if the problem does not go away or is severe.
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:
Incidence not known
Abdominal or stomach pain
blistering, peeling, or loosening of the skin
change in consciousness
decreased urine output
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
fast or irregular heartbeat
general tiredness or weakness
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of consciousness
red skin lesions, often with a purple center
red, irritated eyes
redness of the skin
sores, ulcers, or white spots in the mouth or on the lips
swelling of the face, ankles, or hands
tightness in the chest
unpleasant breath odor
upper right stomach pain
vomiting of blood
yellow eyes and skin
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
loss of bladder control
muscle spasm or jerking of all extremities
sleepiness or unusual drowsiness
sudden loss of consciousness
talking or acting with excitement you cannot control
trembling or shaking
unusual tiredness or weakness
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:
Body aches or pain
difficulty having a bowel movement (stool)
lack or loss of strength
loss of appetite
loss of voice
sleepiness or unusual drowsiness
stuffy or runny nose
acid or sour stomach
burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
change in taste
change or problem with discharge of semen
decreased interest in sexual intercourse
difficulty with moving
feeling of warmth or redness of the face, neck, arms, and occasionally, upper chest
inability to have or keep an erection
longer than usual time to ejaculation of semen
loss in sexual ability, desire, drive, or performance
loss of taste
muscle aching or cramping
muscle pains or stiffness
shakiness in the legs, arms, hands, or feet
stomach discomfort or upset
trembling or shaking of the hands or feet
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.