What should I watch for?
Visit your doctor or health care professional for regular check ups. You will need lab work done before you start this medicine and regularly while you are taking it. This medicine can interfere with PSA laboratory tests for prostate cancer. If you are scheduled to have a lab test for prostate cancer, tell your doctor or health care professional that you are taking this medicine. Check your blood pressure as directed. Ask your health care professional what your blood pressure should be, and when you should contact him or her.
Women who are pregnant or may get pregnant must not handle this medicine. The active ingredient could harm the unborn baby. If a pregnant woman or woman who may become pregnant comes into contact with a leaking capsule, she should wash the exposed area of skin with soap and water immediately and check with her doctor or health care professional.
Do not donate blood while you are taking this medicine or for 6 months after stopping this medicine. This will prevent giving this medicine to a pregnant female through a blood transfusion. Ask your doctor or health care professional when it is safe to donate blood after you stop taking this medicine.
This medicine may make you feel dizzy or lightheaded. This is more likely to happen after the first dose, after an increase in dose, or during hot weather or exercise. Drinking alcohol and taking some medicines can make this worse. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not sit or stand up quickly. If you begin to feel dizzy, sit down until you feel better. These effects can decrease once your body adjusts to the medicine.
Contact your doctor or health care professional right away if you have an erection that lasts longer than 4 hours or if it becomes painful. This may be a sign of a serious problem and must be treated right away to prevent permanent damage.
If you are thinking of having cataract surgery, tell your eye surgeon that you have taken this medicine.
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:
dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
Incidence not known
Blistering, flaking, or peeling of the skin
difficulty with breathing
fast, irregular, pounding, or racing heartbeat or pulse
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
pain or swelling of the treated skin
painful or prolonged erection of the penis
shortness of breath
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:
Change or problem with discharge of semen
decreased interest in sexual intercourse
enlarged and painful breasts
inability to have or keep an erection
loss in sexual ability, desire, drive, or performance
body aches or pain
dryness or soreness of the throat
lack or loss of strength
pain or tenderness around the eyes and cheekbones
shortness of breath or troubled breathing
sleepiness or unusual drowsiness
tender, swollen glands in the neck
tightness of the chest or wheezing
trouble with swallowing
unable to sleep
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.