I had the metallic taste about a month or so ago. It went away and I'm not sure why. As for the heavy lethargic, tired feeling, I've been getting that every day from about noon until 10 p.m. Don't know why. Occasionally I'll have bursts of energy, but lately they have been few and far between. I don't feel toxic or anything like that though. Not sure what that could be, but if it happens after taking your meds then it probably is being caused by them.
Have you had blood work to see if your kidneys and liver are functioning properly? That would be my thought.
Have you had blood work to see if your kidneys and liver are functioning properly? That would be my thought.