If Malegra contains sildenafil, its main effect is on erection, not libido. Libido/sexual desire: Sildenafil generally doesn't directly increase sexual desire. You still need sexual arousal/stimulation. Erection: It increases blood flow to the penis during sexual stimulation, making an erection easier to achieve and maintain. Indirect effect on libido: If erectile difficulties have been reducing your confidence or causing  Malegra , better erections can sometimes make you feel more interested in sex. That's an indirect psychological effect rather than a direct libido-boosting action. If low libido is the main problem: Increasing the sildenafil dose usually won't solve it. Low desire can have many causes, including stress, relationship factors, depression, hormonal issues, and medications. If you're asking because Malegra gives you an erection but you don't feel sexually interested, tell me the Malegra strength and what you're experiencing, and I can explain the likely causes.