The body takes longer to absorb it after a high-fat meal or alcohol. Different brands may not work the same way. Its effects might last longer if you have mild to moderate ED. There is a problem with information submitted for this request. Your doctor may adjust your dose if needed. Keep out of the reach of children. Oral medicines for ED usually work well and cause few side effects.In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to help a man get and keep an test1.ru drug does not protect against sexually . Place the tip of the syringe into you or your child’s mouth and point it towards the cheek. This medicine usually begins to work for erectile dysfunction within 30 minutes after . Viagra works by increasing blood flow to your penis, which helps you have and keep an erection. But this drug only works if you’re sexually aroused. Viagra comes as tablets .