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Overdose
Although there is no report for overdose of Viagra, any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.
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What Is It
Viagra is the first oral drug for male impotence. It works by dilating blood vessels in the penis, allowing the inflow of blood needed for an erection.
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Drug Interactions
If Viagra is taken with certain other drugs, the effects of either could be increased, decreased, or altered. It is especially important to check with your doctor before combining Viagra with the foll
owing:
- Other impotence remedies including Caverject and Muse
- Alpha-blockers such as doxazosin (Cardura)
- Amlodipine (Norvasc)
- Cimetidine (Tagamet)
- Erythromycin (
E-Mycin, Ery-Tab, PCE)
- Itraconazole (Sporanox)
- Ketoconazole (Nizoral)
- Nitrates such as Isordil, Nitro-Bid, and Nitro-Dur
- Rifampin (Rifadin, Rimactane)
- Ritonavir (Nor
vir)
- Saquinavir (Fortovase, Invirase)
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What special precautions should I follow?
Pregnancy¡XViagra is not indicated for use in women. Viagra has not been studied in pregnant women. However, Viagra has not been shown to cause birth defects or other problems in animal studies.
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Other medical problems
The presence of other medical problems may affect the use of Viagra. Make sure you tell your doctor if you have any other medical problems, especially:
- Arrhythmias (irregular heartbeat) or
- Conditions causing thickened blood or slower blood flow, including leukemia; multiple myeloma (tumors of the bone marrow); or polycythemia, sickle cell disease, and thrombocythemia (blood problems)
or
- Priapism (history of)¡XAlthough Viagra does not cause priapism (erection lasting longer than 6 hours), patients with these conditions have an increased risk of priapism and it could occur w
ile using Viagra
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Possible Side Effect
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.
- Abnormal visio
n, 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
- Bleeding of the eye; convulsions (seizures) ; decreased vision or other changes in vision; double vision; prolonged, painful, or inappropriate erection of penis; redness, b
urning, or swelling of the eye; vision loss, temporary
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