威而鋼 - An Overview
What is Generic Viagra?
Generic Viagra is an effective treatment for male erectile dysfunction, or ED. This is also known as impotence. Generic Viagra is a little blue pill you take only when you want to have sex. Generic Viagra helps men consistently get and keep an erection when they become sexually stimulated.
How does Generic Viagra work?
Generic Viagra enables men with ED to respond to sexual stimulation. When a man is sexually excited, the arteries in his penis relax and widen. This allows more blood to flow into the penis. The increased blood flow causes the penis to become hard and erect. The veins that normally carry blood away from the penis then become compressed. This restricts the blood flow out of the penis. With more blood flowing in and less flowing out, the penis enlarges, resulting in an erection. Sometimes the nerves or blood vessels that are part of this process don't work properly. If this happens, a man may not be able to get or keep an erection. Generic Viagra increases blood flow to the penis, so that when a man is sexually excited, he can consistently get and keep an erection. When he is done having sex, the erection goes away.
How well does Generic Viagra work?
Studies show that Generic Viagra improves erections in more than 80% of men taking Generic Viagra 100 mg versus 24% of men taking a sugar pill.No other ED tablet is proven to work better.
Does Generic Viagra automatically cause an erection?
No. You must be sexually excited for Generic Viagra to work. If you take Generic Viagra and are not sexually stimulated, you will not get an erection. Generic Viagra is not a hormone. It is also not an hrodisiac. It's a prescription medicine that gives men with ED harder erections so they can enjoy a better sex life.
Does Generic Viagra come in different strengths?
Generic Viagra comes in 3 doses (25 mg, 50 mg, and 100 mg). Like many medicines, you may benefit from a dose adjustment after starting on Generic Viagra. If it doesn't produce the results you want, let your doctor know. Do not take more Generic Viagra than your doctor prescribes. In most patients, Generic Viagra can be taken up to once a day as needed.
Is Generic Viagra only for men with severe ED?
No. Generic Viagra works for men who have ED, regardless of how severe or mild their ED is. If Generic Viagra helps you get better erections, it doesn't mean you have severe ED. Even men who have difficulties once in a while can benefit from taking Generic Viagra.
Is Generic Viagra safe?
Yes. The safety of Generic Viagra has been demonstrated in over 130 clinical trials and among 13,000 men. These trials show that taking Generic Viagra is about as safe for your heart as taking a sugar pill. Generic Viagra has been used by more than 23 million men worldwide, and over 1 billion doses of Generic Viagra have been prescribed. In fact, no other ED therapy has been studied more than Generic Viagra.
If you use nitrate drugs, often used for 威而鋼 chest pain (known as angina), do not take Generic Viagra.
What are the side effects of Generic Viagra?
Like all medicines, Generic Viagra can cause some side effects. These are usually mild and don't last longer than a few hours. Some of these side effects are more likely to occur with higher doses of Generic Viagra. With Generic Viagra, the most common side effects are headache, facial flushing, and upset stomach. Generic Viagra may also briefly cause bluish or blurred vision or sensitivity to light. Although erections lasting for more than four hours may occur rarely with all ED treatments in this drug class, it is important to seek immediate medical attention. Erections lasting longer than six hours can result in long-term loss of potency.