It has not been determined whether Vidalista 40 is safe or effective for use in children younger than 18. It is recommended to take it as needed, preferably between 30-60 minutes before having sex. You can wait up to 36 hours before having sex after taking it. Repurposing Vidalista 40 may result in severe consequences. Cialis may cause hearing loss, tinnitus, or vertigo. It is recommended that you cease taking your medicine and contact your doctor right away if you have any unexpected loss of hearing. Children shouldn't use tadalafil without a doctor's advice.