What should I watch for?
Visit your doctor or health care professional for regular checks on your progress. This prescription requires that you follow special procedures with your doctor and pharmacy. You will need to have a new written prescription from your doctor every time you need a refill.
This medicine may affect your concentration, or hide signs of tiredness. Until you know how this medicine affects you, do not drive, ride a bicycle, use machinery, or do anything that needs mental alertness.
Tell your doctor or health care professional if this medicine loses its effects, or if you feel you need to take more than the prescribed amount. Do not change the dosage without talking to your doctor or health care professional.
Decreased appetite is a common side effect when starting this medicine. Eating small, frequent meals or snacks can help. Talk to your doctor if you continue to have poor eating habits. Height and weight growth of a child taking this medicine will be monitored closely.
Do not take this medicine close to bedtime. It may prevent you from sleeping.
If you are going to need surgery, a MRI, CT scan, or other procedure, tell your doctor that you are taking this medicine. You may need to stop taking this medicine before the procedure.
Tell your doctor or healthcare professional right away if you notice unexplained wounds on your fingers and toes while taking this medicine. You should also tell your healthcare provider if you experience numbness or pain, changes in the skin color, or sensitivity to temperature in your fingers or toes.
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:
bloody or cloudy urine
difficult, burning, or painful urination
fast, pounding, or irregular heartbeat or pulse
frequent urge to urinate
lower back or side pain
Incidence not known
Blistering, peeling, or loosening of the skin
chest pain or discomfort
difficulty with speaking
difficulty with swallowing
inability to move the arms, legs, or facial muscles
inability to speak
itching or skin rash
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of bladder control
muscle cramps or spasms
muscle pain or stiffness
muscle spasm or jerking of all extremities
pain or discomfort in the arms, jaw, back, or neck
red skin lesions, often with a purple center
red, irritated eyes
seeing, hearing, or feeling things that are not there
sores, ulcers, or white spots in the mouth or on the lips
sudden loss of consciousness
swelling of the feet or lower legs
tightness in the chest
uncontrolled repeated movements (tics)
uncontrolled vocal outbursts
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:
Incidence not known
decreased interest in sexual intercourse
false or unusual sense of well-being
inability to have or keep an erection
loss in sexual ability, desire, drive, or performance
twitching, twisting, uncontrolled repetitive movements of the tongue, lips, face, arms, or legs
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.