I started taking 400mg yesterday for a sinus infection. Fifteen m...

I started taking 400mg yesterday for a sinus infection. Fifteen minutes after my FIRST dose, my stomach started cramping. About five hours later I noticed muscle pain in my thighs all the way down into my toes. It was like I worked out at a gym. This morning I have a metallic taste in my mouth that even lemon water won't cure. I have a VERY HIGH tolerance for medication and usually have to double whatever is prescribed. Fortunately I did not do that with this med since it was new to me. I will not be taking anymore. I will go back to the amox and deal with the infection. I read that apple cider vinegar was good for that - without the side effects. Seriously, beware if you are sensitive to drugs. This one surprised me.