Vidalista Black is one medicine for erectile dysfunction. It works by increasing blood flow to the penile area. This helps men maintain and achieve an erection. It belongs to the group of medications known as phosphodiesterase type 5 inhibitors. Interactions with grapefruit and its juice may affect its absorption. Vidalista Black should not be taken with products containing grapefruit. Alcohol and foods heavy in fat can reduce the effectiveness of tadalafil. Taking it routinely, 30 to 60 minutes before sexual activity, is advised by doctors. Take the medication with a small meal. It may work better if you take it without food. Moreover, taking it with a full stomach interferes with its effective functioning.