Hello.
Have you ruled out urinary infection. This is the first concern you should address. You may or may not have fever. Also make sure you are drinking enough of water / fluids.
I am not sure if these medicines can cause foul smelling urine.
How is the color of the urine? Do you get any burning sensation?
Regards
Interesting, in the past few months I have been changed to Keppra and lamotrigine (lamictal). In recent weeks, my urine has developed a strong, unpleasant odour. I've had my urine tested, been on a course of antibiotics (tests came back to shoe no infection) and yet the smell is persisting.
Not an asparagus fan, and can't think what else might have caused it...