Hi @frankv
Many AEDs have constipation as side effect, unfortunately. I had it with Vimpat and also with Keppra.
I try to manage that by eating lots of raw vegetables and some fruits like papaya and prunes. It has helped a lot.
As far as I know, alcohol drinking is not recommended with any AED, as it can increase the side-effects of AEDs and/or reduce seizure threshold.
Chris