Can one dose of ativan (lorazepam) or propranolol cause tremors and dark urine? about to see cardiology today. just wondering.

Not that I know of: Both drugs, in fact, REDUCE tremor in most people. Dark urine is usually just related to dehydration, but if you are normally hydrated and it still appears dark, a urinalysis is the place to at least start. Cannot tell you what is going on without a more complete history of the problem, as well as more medical information. Talk to your cardiologist about it.