I have been on Lithium alone in the past and it was fine. I only switched to Lamictal because it had less side effects for me. I was on Lamictal alone for several years. So it is possible. To tell you the truth, I'd also like to get back to taking just one med.

The orgasm thing though, it was going so well for you, it sucks that they stopped! The exercise should make them even better. Like confused said, could be the stress.