Side effects of Viagra
Viagra has many side effects besides being advertised as "aphrodisiac", and it is not suitable for some people to take Viagra.
1. Lower blood pressure: taking Viagra can cause lower blood pressure, while heart disease drugs such as trinitroglycerin or nitrate can also lower blood pressure. Therefore, if Viagra is mixed with these drugs, blood pressure will be greatly reduced, and sometimes it may endanger life.
2. Cardiovascular disease: impotence may be the precursor of heart disease, diabetes or cancer, and taking this medicine may cover up the real condition. Therefore, men with cardiovascular diseases should be careful to use it to avoid inducing heart disease or causing stroke.
3. Dizziness: This drug may cause a sudden drop in blood pressure. If you take nitroglycerin and other drugs at the same time, you will often feel dizzy or even faint immediately.
4. Abnormal erection: men with urethritis and leukaemia can have an erection for a long time after taking it, resulting in injury to pudendal muscle tissue and even aggravation of impotence. If you have an erection for more than 4 hours, you must seek medical attention immediately.
5. Headache: In clinical trials, it was found that about 13% of people had headache after taking medicine, and individuals had severe headache, and the larger the dose, the more severe the headache.
6. Blindness: About 3% of the drug users may have temporary blurred vision, and some may also have the illusion of seeing blue light. The United States Air Traffic Control Agency prohibits pilots from flying within 6 hours after taking Viagra, in order to prevent flight accidents.