Vidalista, a generic form of tadalafil, is used primarily to treat erectile dysfunction and benign prostatic hyperplasia, with a long half-life allowing effects to last up to 36 hours. It is available in multiple dosages (2.5 mg, 5 mg, 10 mg, 20 mg) and can be taken on an as-needed basis or daily. The medication has potential side effects such as headache, back pain, and rare visual disturbances, and should not be used with nitrates due to contraindications.