Femsil Tablet belongs to the group of medicines called phosphodiesterase type-5 (PDE 5) inhibitors primarily used to treat erectile dysfunction (impotence) in adult men. Additionally, Femsil Tablet may also be used to treat pulmonary arterial hypertension (high blood pressure in the lungs) in adults to improve the ability to exercise and to slow down clinical worsening.
 
Femsil Tablet works by relaxing the blood vessels in the penis, thereby allowing the blood to flow into the penis when the person is sexually excited. Thus, Femsil Tablet helps treat erectile dysfunction. Femsil Tablet relaxes the blood vessels, increases the blood supply to the lungs and reduces the workload of the heart. Thereby, treating pulmonary hypertension.
 
You are advised to take Femsil Tablet for as long as your doctor has prescribed it for you, depending on your medical condition. In some cases, Femsil Tablet may cause side effects such as headache, nausea, dizziness, indigestion and stomach upset. Most of these side effects do not require medical attention and will resolve gradually over time. However, you are advised to talk to your doctor if you experience these side effects persistently.
 
Do not take Femsil Tablet if you are allergic to any of the components or if you are taking nitrate medicines or riociguat (a drug used to treat pulmonary hypertension). Femsil Tablet is not recommended for use in children. Consult your doctor if you experience hearing or visual impairment. Avoid consumption of alcohol as it may impair your ability to get an erection. Taking Femsil Tablet after a heavy meal might take longer time for the medicine to work; therefore you are advised to take Femsil Tablet with light meals.

Femsil Tablet belongs to the group of medicines called phosphodiesterase type-5 (PDE 5) inhibitors, primarily used to treat erectile dysfunction (impotence) in adult men and pulmonary arterial hypertension (high blood pressure in the lungs) in adults to improve the ability to exercise and to slow down clinical worsening. Femsil Tablet works by relaxing the blood vessels in the penis, thereby allowing the blood to flow into the penis when the person is sexually excited. However, Femsil Tablet helps the person to get an erection only if he is sexually stimulated. Femsil Tablet relaxes the blood vessels, increases the blood supply to the lungs and reduces the workload of the heart. Thereby, treats pulmonary hypertension.

Do not take Femsil Tablet if you are allergic to any of the components, if you are taking medicines called nitrates which are used to treat angina or chest pain, or guanylate cyclase stimulator medicines (used to treat heart failure and PAH). Inform your doctor if you have/had heart problems such as angina, heart attack, irregular heartbeat, or heart failure, blood circulation problems, low blood pressure, eye or ear problems, sickle cell anaemia (an abnormality of red blood cells), multiple myeloma (cancer of bone marrow), leukaemia (cancer of blood cells), stomach ulcer, bleeding problems, problems with the shape of the penis or Peyronie's disease (a condition that causes painful erections).

• Do not take Femsil Tablet more than once in a day if prescribed for erectile dysfunction. 
• Talk to your doctor if the erection persists for greater than four hours after the sexual intercourse.