Fildena 100mg works by relaxing the smooth muscles in your lungs and increasing blood flow into them. This effectively treats pulmonary arterial hypertension and improves your quality of life. This medication is available in the form of tablets. Each film-coated tablet contains 25/50/100 mg of sildenafil citrate. Sildenafil is a phosphodiesterase-5 (PDE-5) inhibitor primarily used to treat erectile dysfunction and pulmonary hypertension. It's important to take the drug as directed by your doctor. If you're taking any other drugs, make sure to tell your provider. They may need to change their medication doses or adjust the time they take them. You should also not consume alcoholic beverages or any other products that contain alcohol while taking this medication. These can increase the effects of Sildenafil and create side effects. The medication can also be harmful if taken with other PDE-5 inhibitors, like Viagra or Cialis. This can lead to an overdose. Moreover, men taking nitroglycerin or other drugs containing nitrates should avoid using this medication. It can also interact with grapefruit juice and cause a negative trail of side effects. People with pulmonary arterial hypertension should seek medical attention as soon as possible to get treated. Early treatment can help prevent the disease from progressing and leading to death. Fildena