One such PDE inhibitor is Vidalista 40 mg. An erection is encouraged and blood flow is increased when a person experiences sexual arousal because it helps relax the smooth muscles in the penile blood vessels. Observe your physician's guidance regarding the amount and timing of this medication. Observe everything at once. Never consume, smash, or break it. It is best taken with food. It enhances blood flow to the penis by relaxing the muscles in the penile blood vessels. Some of the negative effects of Vidalista include headaches, nausea, back discomfort, stuffy nose, impaired vision, and flushing in the face, neck, or chest. Usually taken 30 to 60 minutes before participating in sexual activity, its effects might last up to 36 hours.