Ive been taking Cynomel in 25mcg tablets (I only need one tablet a day taken in 2 parts) and I have been using the same batch since December.
I got a new batch and started taking them on Friday. By Saturday I felt a bit weird ie a bit foggy muzzy headed and slightly off balance and constant noise in my head.
Couldnt understand what it was and then looked at the bottle and saw it was the new batch I had started. The next day I took it in smaller doses and I was okay.
Does anyone know if the strength can diminish over time and that taking a new batch can cause a few issues to start with?