Side effects of Sildenafil and Tadalafil will differ from person to person. It also has the most variable possible dosage, making it quite a versatile treatment. Also, what does 5mg dose do daily? The bioequivalence between Tadalafil and Cialis also means that you should expect them to work best in the same circumstances. Really, the choice is down to you. This is particularly true if you have any heart conditions or health problems. However, it is generally thought that Tadalafil produces less of the more common side effects.It is the brand name for tadalafil, a medication also used to treat ED. Tadalafil is in a class of drugs called phosphodiesterase-5 (PDE5) inhibitors and is . Manufacturer: LILLY Approval date: January 7, Strength (s): MG [ RLD] [ AB1] Has a generic version of Cialis been approved? Yes. The following products .