Like any medication, Vidalista 40 can have side effects. It is not recommended for patients with severe liver disease. Patients under the age of 18 are also not recommended to take this medicine. Likewise, Vidalista 40mg  is not suitable for people with a known allergy to Tadalafil. The drug is available in different dosages and sizes.It can be taken once a day, but should not be taken for more than two consecutive years.