"for pain in the knees before bedtime that does not cause heart palpitations?"
Palpitations are commonly experienced after cannabis consumption and are usually ascribed to the sinus tachycardia or more rarely to premature ventricular contractions.
I personally have pain in my knees from running and use a a CBD topical for all of my joints. Apothecanna has a variety of topical that have really helped me with knee pain.
evan