For the treatment of erectile dysfunction in men, Fildena double 200 is used. Sildenafil is a member of the class of medications known as PDE 5 inhibitors. These medications inhibit the over-activation of phosphodiesterase type-5. One place this enzyme functions is in the penis. As soon as you remember, take the missed Fildena dosage. When the time for the next scheduled dose approaches, it can be skipped. This is applicable to fast-paced injection regimens such as pulmonary hypertension. Because of the risk factors for cardiovascular disease, men are advised against having sex. When you have high or low blood pressure, you should exercise caution and avoid taking sildenafil. Medicine should be kept at room temperature and out of direct sunlight and heat.