vidalista 40 mg (tadalafil) as one of a selective group of clinically proven PDE5 inhibitor treatments that works for most men with erectile dysfunction ED, the condition where a man cannot achieve or maintain a hard sex (erection) suitable for sexual activity. Centurion Vidalista 40 mg are yellow, almond in shape, film-coated tablets and with their 36 hour effectiveness are often to referred to as “The Weekend Pill”.