Viagra is the brand name for the drug sildenafil for treatment - but not cure - erectile dysfunction. It works by improving blood flow. You can take Viagra food, but for best results, you should not take certain types of food. Avoiding heavy drinking is also a good idea when taking Viagra.

Usage
Viagra increases penile blood flow during sexual stimulation, which can lead to erection. The drug does not permanently cure erectile dysfunction and does not increase libido. The doctor recommends taking Viagra about one hour before the sexual activity to get the best resolution ults, but for convenience, you can take it four hours ago. Follow the doctor's instructions, do not increase the dose or take more frequent medication than the guide. If you think it doesn't work, talk to your doctor. He may increase the dose, but you don't want to add too much dose and may have serious side effects.
Viagra and Food
You may or may not take Viagra, according to the US National Library of Medicine website PubMed Health. You may wish to avoid taking a high-fat meal as this will delay the effect of the drug. For two reasons, it is best not to bring Viagra with grapefruit juice. Like high-fat foods, grapefruit juice can delay the action of Viagra. In addition, it can increase your blood level medications and can cause toxic side effects. Drugs.com pointed out that this is unlikely to happen, but occasionally this happens.
Viagra and Alcohol
When taking Viagra, you should also avoid drinking a lot of alcohol. Drugs can dilate blood vessels and increase blood flow, while alcohol has some similar effects. In some people, this can lead to low blood pressure while standing, which can lead to increased heart rate, dizziness and even fainting. In related studies, as described by Drugs.com, the alcohol dose is unusually high, equivalent to about 6 ounces of 80 ounces of vodka in 10 minutes - or 6 rounds -
Notes
Although Viagra does not interact with most foods and is usually safe to take low or medium amounts of alcohol, i does have a negative interaction with many other substances. Before you merge with Viagra, tell your doctor about any supplements or medications you take. Some examples of substances that interact with Viagra include any type of nitrate drug, certain blood pressure drugs, epilepsy drugs, and St. John's wort. Interactions may involve an increase in side effects of one or the other, or a decrease or increase in the expected effect.