Suhagra 100 mg (sildenafil) for erectile dysfunction, there isn't really a “missed dose” in the usual sense because it is normally taken as needed, not on a fixed daily schedule. D DailyMed +1 If you planned to take it before sex but forgot, don't double the dose. If you still want to take it, sildenafil can generally be taken 30 minutes to 4 hours before sexual activity, with about 1 hour being typical. Suhagra 100 mg not take more than one dose in 24 hours. D DailyMed If you already took another sildenafil-containing product (such as Viagra, Silagra, Malegra, or Vigora), don't take Suhagra as an additional dose. Also, 100 mg is the maximum recommended sildenafil dose, and 50 mg is the usual starting dose. D DailyMed If you mean that you take Suhagra 100 mg regularly and missed a scheduled dose, tell me how often you were instructed to take it, because the advice can be different.