@damcipro Interesting that you said that "serious effects on your muscles".
I was prescribed an antibiotic due to an injury, two substantial cuts on my leg, and given the antibiotic as a precautionary measure this past week.
I rarely take mediations but because of the type of wound/injury I started it and then stopped.
As in other times with taking medications my back went out, muscles, with just three tablets.
My belief is that it is due to sodium in medications. Meaning I develop a sodium/potassium imbalance. When this happens, for me, I take potassium tablet(s) and it relieves the pain after a short while.
Barbara