Sildenafil citrate, commonly marketed as Viagra, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. In addition to its brand name, there are several synonyms for sildenafil citrate. Some of the common synonyms include Revatio, Zenegra, Silagra, Suhagra, and Penegra. These medications contain the same active ingredient as Viagra and are used for the same purposes. The use of different brand names and synonyms allows pharmaceutical companies to market the same medication under multiple names. It is important to note that while these medications are synonyms, they may have different dosages, strengths, and side effects, so it's important to consult with a healthcare provider before taking any medication.