Malegra 120, which contains sildenafil citrate, works by increasing blood flow to the penis to help achieve and maintain an erection during sexual stimulation. Youll know its working when you experience a firmer and longer-lasting erection in response to sexual arousal, usually within 30 to 60 minutes after taking theMalegra 120mgpill. Physical signs like increased penile sensitivity and better erectile response are key indicators. However, the medication won't cause an automatic erectionsexual stimulation is necessary. If you dont notice any improvement in erectile function after a few tries or you experience side effects like headache or dizziness, consult your doctor.