Is your husband taking any cholesterol-lowering drug? Drugs in the statin class (e.g.,
Lipitor, Zocor, etc.) can cause muscle
weakness as a side effect. If he is taking such a drug, it would be a very good idea for him to mention this problem to the doctor that prescribed the medication so that he can be switched to a product that works better for him. This particular side effect can be a sign that the medication is adversely affecting his liver function, so it is not something to ignore.