Erectile Dysfunction as it sounds, is a problem in which men are unable to either get or keep an erection for enough time to enjoy sexual intercourse. This is said to be one of the most deadly and hated health issue in men. It is a sexual health issue in men which impacts the confidence of a man severely. It normally is said to occur in men who are above the age of 40. Although, men who are below 40 may also suffer from this issue due to many reasons. Statistics show that 55% of men above 40 years of age suffer from this issue of ED. Also, 25% men below 40 suffer from this sexual health problem. So, as seen above, ED affects a very large population of men all around the world. There are a lot of things which could cause ED such as smoking, obesity, heart problems, atherosclerosis, diabetes, etc. Poor flow of blood to the penile region is the main reason which leads to ED in men. Initially, there were a few injectable and natural treatment options which were there for treating ED in the olden days, but their action duration was very short. Later in 1998, the first oral medicine for ED, Viagra was introduced, which changed the face of the pharmaceutical industry. After the expiry of the patent, many generic versions of the medicines came out. One of which was Sildenafil Citrate 100mg tablet. This generic version was named after the active ingredient Sildenafil Citrate which is also used in the brand version – Viagra. This drug has been approved by the FDA as safe and effective drug against ED. It comes under the class of drugs, referred to as PDE5 inhibitors. Buy Sildenafil Citrate 100mg works by dissolving in the blood and inhibiting the action of the enzyme PDE5 in the process. Later, this leads to increase in the level of Nitric Oxide in the body which in turn improves the production of the enzyme cGMP which is responsible for the good flow of blood in the body. When this happens, the arteries in the penile region tend to get dilated and the muscles relax which ensures that more blood flow into the penis but not enough blood is able to come out of the penis. All this leads to the penis getting filled with blood. This is the main reason that men finally get erections which are harder and also last for a long time. This drug Sildenafil Citrate is suggested to be taken normally as a 100mg tablet once a day. This drug is taken along with water, approximately an hour before indulging in sexual intercourse. It is very important to maintain a gap of an hour between two doses. When this drug is taken one should avoid concomitant use of alcohol, tobacco, nitrate drugs, grapefruit products, alpha-blockers and other PDE5 inhibitors to avoid any interactions or lead to ineffectiveness of the drug. This medicine is strictly to be taken after a doctor’s approval. Also, only men who are suffering from erectile dysfunction issues should take Sildenafil Citrate 100mg.