Manforce 100 mg (sildenafil) for erectile dysfunction, it is normally taken only when needed before ***** activity, rather than on a fixed daily schedule. So there usually isn't a “missed dose” to make up. If you planned to take it before sex but forgot, don't take an extra or double dose later. If you still want to have sex, take it only according to the dosing instructions your doctor gave you. Do not take more than one sildenafil dose in 24 hours. If you're taking sildenafil for pulmonary hypertension on a regular schedule, missed-dose instructions are different: take it when remembered unless it's nearly time for the next dose, and don't double up. Also, because you've been asking about several ED medicines, don't combine Manforce with Penegra, Suhagra, Malegra, Fildena, or tadalafil products such as Tadfil/Tadalis unless your doctor specifically tells you to. If you tell me whether you take Manforce 100 mg occasionally before sex or every day, I can give you the appropriate missed-dose advice.