not listed / othe
"Great results. Took plain Guaifenesin, 12 hr, 600mg for a cold/bronchitis, but later realized I had no muscle achiness, which otherwise, I have every day. So, I tried Guaifenesin without a cold, and most all the achiness was gone.  The good effect lasted a few days, then the aches were back.  Did lots of yard work, with worse aches after, and so I took Guaifenesin after the fact, and it quickly helped. After reading a lot about, it appears to relax the muscles, although this is not a technical answer. Evidently, taking aspirin or other with salicylates? Blocks the good effect. I was at a point where I wondered if I had arthritis, but I have no joint pain.  Guaifenisen works for me, although I won't take it every day."