An erection is produced via a complex chain of events, involving signals from the nervous system and the release of chemical messengers within the tissues of the penis. Another brand of sildenafil tablets called Revatio is often used in this condition. The 50mg dosage may not be high enough to be effective for you. Not being sexually stimulated. This is a drug known as a PDE5 inhibitor. · Viagra Connect is a medicine that treats ED symptoms such as getting an erection, the hardness of an erection, and maintaining an erection in men aged 18 years and older. The treatment is not suitable: For women. For men who do not have ED symptoms. When other health problems might cause issues. Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is approved for this use in males. Viagra Connect is indicated in adult men with erectile dysfunction, which is the inability to achieve or maintain a penile erection sufficient for satisfactory sexual performance. In order for Viagra Connect to be effective, sexual stimulation is required.