Sildenafil Citrate, the same active ingredient in Viagra, is used in the formulation of Vigora 100, a powerful drug for erectile dysfunction. It helps men get and keep a hard erection during sexual activity by increasing blood flow to the penis. German Remedies produces Vigora 100 mg, which is renowned for its quick action (usually starting to work in 30 to 60 minutes) and long half-life (up to 4–6 hours). For males looking for dependable, on-demand performance, it's a dependable option. Use only as directed by a medical professional.