|
|
|
|
|
|
|
|
|
|
| Other drug names: | A-Am An-Az B C-Ch Ci-Cz D-Dh Di-Dz E F G H I-J K-L M-Mh Mi-Mz N-Nh Ni-Nz O P-Pl Pm-Pz Q-R S-Sn So-Sz T-To Tp-Tz U-V W-Z 0-9 |
| Contents of this page: | |
Some commonly used brand names are:
In the U.S.--
In Canada--
Sildenafil (sil-DEN-a-fil) belongs to a group of medicines that delay the enzymes called phosphodiesterases from working too quickly. The penis is one of the areas where these enzymes work. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence).
By controlling the enzyme phosphodiesterase, sildenafil helps to maintain an erection that is produced when the penis is stroked. Without physical action to the penis, such as that occurring during sexual intercourse, sildenafil will not work to cause an erection.
This medicine is available only with your doctor's prescription, in the following dosage form(s):
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For sildenafil, the following should be considered:
Allergies--Tell your doctor if you have ever had any unusual or allergic reaction to sildenafil. Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes.
Pregnancy--Sildenafil is not indicated for use in women. Sildenafil has not been studied in pregnant women. However, sildenafil has not been shown to cause birth defects or other problems in animal studies.
Breast-feeding--It is not known whether sildenafil passes into breast milk. Sildenafil is not indicated for use in women.
Older adults--Elderly people are especially sensitive to the effects of sildenafil, which may increase their chance of having side effects. Patients 65 years of age and older are started on a low dose, 25 mg, of sildenafil. The dose may be increased by a doctor as needed and tolerated.
Other medicines--Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking sildenafil, it is especially important that your health care professional know if you are taking any of the following:
Other medical problems--The presence of other medical problems may affect the use of sildenafil. Make sure you tell your doctor if you have any other medical problems, especially:
Special patient directions come with sildenafil. Read the directions carefully before using the medicine .
This medicine usually begins to work within 30 minutes after taking it. It continues to work for up to 4 hours, although its action is usually less after 2 hours.
Dosing--The dose of sildenafil will be different for different patients. Follow your doctor's orders or the directions on the label . The following information includes only the average doses of sildenafil. If your dose is different, do not change it unless your doctor tells you to do so.
Storage--To store this medicine:
Sildenafil has not been studied with other medicines used for treatment of erectile dysfunction. Presently, using them together is not recommended .
Use sildenafil exactly as directed by your doctor . Do not use more of it and do not use it more often than your doctor ordered. If too much is used, the chance of side effects is increased.
If you experience a prolonged or painful erection for 4 hours or more, contact your doctor immediately. This condition may require prompt medical treatment to prevent tissue damage of the penis and possible permanent impotence.
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.
Less common
Abnormal vision, including blurred vision, seeing shades of colors differently than before, or sensitivity to light; bladder pain; cloudy or bloody urine; dizziness; increased frequency of urination; pain on urination
Rare
Bleeding of the eye; convulsions (seizures); decreased vision or other changes in vision; double vision; prolonged, painful, or inappropriate erection of penis; redness, burning, or swelling of the eye; vision loss, temporary
Note: The following rare side effects have not been completely established as being caused by sildenafil
Blood sugar problems (more likely with patients with diabetes mellitus), such as anxiety, behavior change similar to drunkenness, blurred vision, cold sweats, confusion, cool and pale skin, difficulty in concentrating, drowsiness, excessive hunger, fast heartbeat, headache, nausea, nervousness, nightmares, restless sleep, shakiness, slurred speech, and unusual tiredness or weakness; bone pain; breast enlargement; chest pain; chills; confusion; convulsions (seizures); deafness; decrease in amount of urine or in frequency of urination; dizziness or lightheadedness, especially when getting up from a lying or sitting position; dry eyes; dry mouth; dryness, redness, scaling, or peeling of the skin; eye pain; fainting or faintness; fast, irregular, or pounding heartbeat; feeling of something in the eye; groups of skin lesions with swelling; headache (severe or continuing); heart failure; hives; increase in size of pupil; increased sweating; increased thirst; itching of skin; low blood pressure; lower back or side pain; migraine headache; nausea (severe or continuing); nervousness; numbness of hands; painful, swollen joints; redness, itching, or tearing of eyes; shortness of breath or troubled breathing; skin paleness; skin rash; skin ulcers; sore throat and fever or chills; sudden weakness; swelling of face, hands, feet, or lower legs; twitching of muscles; unusual tiredness or weakness; unusual feeling of burning or stinging of skin
Other 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. However, check with your doctor if any of the following side effects continue or are bothersome:
More common
Flushing; headache; nasal congestion; stomach discomfort following meals
Less common
Diarrhea
Rare
Anxiety
Note: The following rare side effects have not been completely established as being caused by sildenafil
Abdominal pain; abnormal dreams; aches or pains of muscles; clumsiness or unsteadiness; cough; diarrhea or stomach cramps (severe or continuing); difficulty in swallowing; ear pain; increased amount of saliva; increased skin sensitivity; lack of coordination; loss of bladder control; mental depression; nausea; numbness or tingling of hands, legs, or feet; rectal bleeding; redness or irritation of the tongue; redness, soreness, swelling, or bleeding of gums; ringing or buzzing in ears; sensation of motion, usually whirling, either of one's self or of one's surroundings; sexual problems in men (continuing), including failure to experience a sexual orgasm; sleepiness; sores in mouth and on lips; tense muscles; tightness of chest or wheezing; trembling and shaking; trouble in sleeping; vomiting; waking to urinate at night; worsening of asthma
Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.
Developed: 05/28/98
Revised: 2/15/00
| Micromedex, Inc. Disclaimer |
| Health Topics | Drug Information | Dictionaries | Directories | Other Resources |
|
U.S. National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894
Copyright and Privacy Policy, We welcome your comments. Last updated: 24 January 2001 |