I you got overall lower libido, it would be a better idea to use something like n2Generate ES. Cialis and the likes are only good when taken right before sex, but if you want to improve your overall libido, and improve erections on a constant basis, n2generate Es will be a much better choice. Besides, this is personally my case, but could be yours as well - I get really bad headaches with viagra, even at very small dosages.