Anyone should avoid taking expired Vidalista 80 mg. Once a medicine passes its expiration date, its strength, quality, and safety are no longer guaranteed, and degradation may reduce effectiveness or potentially cause unintended effects. This is particularly important for people who: Take Vidalista 80  or nitrate-containing medicines, because tadalafil can cause a dangerous drop in blood pressure when combined with them. Take riociguat or another guanylate-cyclase stimulator. Have been advised by a healthcare professional to avoid tadalafil because of cardiovascular or other health concerns. Have an expired tablet that was stored improperly, such as in excessive heat or humidity. Even if the tablet looks normal, do not assume an expired Vidalista 80 mg is safe to use. Replace it with an in-date medicine obtained from a legitimate pharmacy and follow the prescribed dose.