what are viagras
Viagra is a medication used to treat erectile dysfunction in men by relaxing blood vessels in the penis. It was first introduced in 1998 and works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5). The recommended starting dose is 50mg, and it should not be taken more than once per day. Common side effects include headaches, flushing, nausea, and dizziness, while more serious side effects may include chest pain, vision changes or loss, and hearing loss. Viagra should not be taken by individuals who are taking nitrates or have had a heart attack or stroke in the past six months. While there have been studies exploring its use in women, Viagra is only approved for use in men. Alternatives to Viagra include lifestyle changes, vacuum pumps, and other medications such as Cialis and Levitra. It is important to discuss any concerns or questions with a healthcare provider before starting this medication.