Flagyl is not to be swished around the mouth and savored like wine. You guys need to power swallow it with copious amounts of liquid. You will only have a metallic taste if you let it linger on your tongue. There are certain things in life you have to get out of your mouth and down your throat FAST and flagyl is one such substance. Magnesium Citrate is another. I have no problem with it if I power chug it. It’s all mental- mind over matter!
The other systemic side effects of flagyl are quite common unfortunately, although I have never experienced them.