My boyfriend has been on the fentanyl patch(was 75 now he has himself down to 50) for the past 7 years.The doctor also has him on ambien.He tried getting off the patch and after 28 days,was still having withdrawl symptoms.He still has a hard time sleeping with the ambien.Recently his heart has started pounding out of the blue and he gets horrible muscle cramps and spasms.His Doc wont listen.Any advice?