I have been experiencing severe cramps in my thighs at night. Could these be caused by Bystolic? I take 5mg at night and 2.5 in the morning. I have had ultra sounds and varicose vein removal prior to taking Bystolic. I never experienced the cramps before taking this medication. All lab work returns perfect such as potassium and magnesium levels. I stay well hydrated, also. These cramps are unlike charley horses. They are extremely painful. I am unable to move much less walk when I have these. Any ideas and/or suggestions?And yes, I have tried putting a bar of soap under my mattress and drinking pickle juice and tonic water. I dread going to bed at night but am becoming exhausted. Please help. Thank- you