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Other Medicines
When you are taking Viagra, it is especially important that your health care professional know if you are taking any of the following:
- Cimetidine (e.g., Tagamet)
- Erythromycin (e.g.,
E.E.S. or Ery-Tab)
- Itraconazole (e.g., Sporanox)
- Ketaconazole (e.g., Nizoral)
- Mibefradil (e.g., Posicor)
- Ritonavir (e.g., Norvir)
- Saquinavir (e.g., Fortovase or Inv
irase)¡XThese medicines may increase the unwanted effects of Viagra, unless lower starting doses of Viagra are used
- Nitrates, such as nitroglycerin (e.g., Nitrostat or Transderm-Nitro)¡XViagra
creases the lowering of blood pressure by nitrates too much and their use together is not recommended
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Symptoms of overdose may include:
No overdose of Viagra has been reported. However, any medication taken in excess can have serious consequences. If you suspect an overdose, seek medical attention immediately.
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What special precautions should I follow?
Breast-feeding¡XIt is not known whether Viagra passes into breast milk. Viagra is not indicated for use in women.
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Description
Viagra (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. Viagra is used
to treat men who have erectile dysfunction (also called sexual impotence).
By controlling the enzyme phosphodiesterase, Viagra helps to maintain an erection that is produced when the penis i
s stroked. Without physical action to the penis, such as that occurring during sexual intercourse, Viagra will not work to cause an erection
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Before Taking This Medicine
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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Side Effects
Less common to rare side effects may include:
- Abdominal pain, abnormal dreams, abnormal ejaculation, allergic reactions, anxiety, asthma, bloodshot eyes, bone pain, breast enlargement, cataract
s, chest pain, chills, coordination problems, cough, depression, difficulty breathing, difficulty swallowing, dilated pupils, dizziness, double vision, drowsiness, dry eyes, dry mouth, emotional or me
ntal disturbances, eye inflammation or pain, other eye disorders, fainting, falling, genital problems, gout, gum inflammation, heart problems, increased night-time urination, increased pressure in the
eyes,
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