My dentist gave me Metronidazole last Friday as I'd developed a bad infection after having tooth out. I take 100 mg levothyroxine daily as I've had hashimotos for some years. I started feeling unwell very soon after take no the Metronidazole - Extreme exhaustion, (have to keep going to lie down and do sleep) a muscle weakness, very foggy brain etc. Was feeling really frightened until I read something a little while ago on here from a few years ago about the bad reaction of taking the two medications together. Has anybody else had any similar problems please?