Is taking promethazine dm without codeine causing my restless leg syndrome (from heroin withdraw) and/or making it worse?

Restless leg syndrom: the medication that you are taking promethazine has anticholinergic side effects which aggravates restless leg syndrome. Use alternate medications which do not have anticholinergic side effects and you can discuss with your primary physician about these medications. Iron supplements, magnesium 2 mg a day and stretching exercises prior to sleep helped alleviate symptoms of restless leg syndrome