Tadalista Professional is a medicine used to treat erectile dysfunction in men. It belongs to the class of medications known as phosphodiesterase type 5 inhibitors, which work by increasing blood flow to the penis during sexual stimulation. Tadalafil is the active ingredient in Tadalista Professional. Tadalista Professional side effects include headaches, nausea, stuffy nose, back discomfort, impaired vision, and flushing in the face, neck, or chest. When taking a medication with food or another medication, pill interactions usually occur. Blood flow via the blood vessels needs to be smooth since it helps sustain an erection. It needs to be taken 30 to 60 minutes before bed.