Viagra may cause dizziness, blurred vision, fainting, or lightheadedness. Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to Viagra . Using Viagra alone, with certain other medicines, or with alcohol may lessen your ability to drive or perform other potentially dangerous tasks.
To minimize dizziness or lightheadedness, sit up or stand slowly when rising from a seated or lying position.
Viagra may rarely cause a painful penile erection, which can last for long periods of time and is not related to sexual activity. If not treated immediately, this may lead to permanent erectile dysfunction or impotence (not being able to have or maintain an erection for sexual purposes.
Do not use Viagra if your doctor has advised you to avoid sexual activity because of heart problems.
Viagra does not protect against sexually transmitted diseases, including HIV infection. Use "safe sex" practices such as latex condoms.
Use Viagra with caution in the ELDERLY because they may be more sensitive to its effects.
Viagra is not recommended for use in CHILDREN.
PREGNANCY and BREAST-FEEDING: It is not known if Viagra can cause harm to the developing fetus. If you become pregnant while taking Viagra , discuss with your doctor the benefits and risks of using Viagra during pregnancy. It is unknown if Viagra is excreted in breast milk. If you are or will be breast-feeding while you are using Viagra , check with your doctor or pharmacist to discuss the risks to your baby.