No, it is probably a side effect of medication. Sexual dysfunction is not a symptom of als especially in early stages. Not until late stages and most of the other muscles are paralyzed do men loose sexual function.
I would go to the dr and see if it medication, or part of your anxiety getting worse and need a different medicaiton.
I would go to the dr and see if it medication, or part of your anxiety getting worse and need a different medicaiton.