This will make the blood flow to these muscles more easily. While on an outing in Tijuana last year, she popped into a few pharmacies to see if they stocked her medications. Lifestyle modifications and erectile dysfunction: what can be expected? If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. Take sildenafil as needed before sexual activity. Doing pelvic floor exercises will help you build up the muscles around the penis.VIAGRA can cause your blood pressure to drop suddenly to an unsafe level if taken with certain other medicines. Do not take VIAGRA if you take any other medicines called “nitrates.” Nitrates are used to treat chest pain (angina). A sudden drop in blood pressure can cause you to feel dizzy, faint, or have a heart attack or stroke. If you are planning to cross the border for your medications, or get them through an online pharmacy abroad, here are two things you should know. First: It is technically illegal. Second: It is. Examples of Viagra’s more commonly reported side effects include: headache. flushing (temporary warmth, redness, or deepening of skin color) stuffy nose. indigestion (upset stomach) mild vision.