The pill must not be chewed, crushed, or broken in any way. Do not drink excessive amounts of alcohol eg, 5 or more glasses of wine or 5 or more shots of whiskey when taking tadalafil. You may take this medicine with or without food. Where to Buy Vidalista is a prescription drug. Brand names Why is this medication prescribed? Side Effects Along with its needed effects, a medicine may cause some unwanted effects.If you have a private prescription for tadalafil, read the information that comes with your medicine carefully. The strength and dosage instructions can vary. Dosage and strength. Tadalafil comes as mg, 5mg, 10mg and 20mg tablets. Dose for erectile dysfunction. The usual dose of tadalafil for erectile dysfunction is 10mg when you need it. Tadalafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation. . The Vidalista 60 mg medicine is an oval and yellow tablet that consists of 60 mg of Tadalafil. Tadalafil is the active pharmaceutical ingredient of the medicine, which falls in the PDE type 5 inhibitor class action of the medicine. It is an FDA-approved ingredient that people can buy if they have a prescription for the medicine.