Vidalista 60 and Vidalista 40 are variants of the same salts used to treat erectile dysfunction or male impotency. Preventability says that Vidalista 60 must not be consumed within the same hour or same day (within the 24 hours duration) due to higher probability of side effects or overdosage. Although, it is not an issue if the patient wants to change the dosage from 40 to 60 mg after one day...