Januvia and muscle pain

My husband started januvia a few months ago, in addition to his lipitor and benazepril and glumetza, which he was already taking for some time. Since starting I have noticed him being tired, irritable (almost angry), and short on patience in general. He has not complained of muscle pain, but has commented about having less hair. When I mention the mood/behavior changes, he tells me I'm wrong, he feels just fine. He won't discuss it with his doctor.
Has anyone else heard of or seen this effect? I have read only one or two comments along this line. It didn't happen all at once, change came over time. Think about it, ask the people you live with.
Thanks, good luck to all

After starting Januvia, I started having severe muscle pain along the lines of lactic acid burning pain when doing anything that used my muscles. I also developed creep crawly restlessness in my muscles. I also felt like I had the flu and my sinuses were swollen and had bloody drainage. After I went off Januvia, these symptoms gradually subsided. I went back on it and after two days on it all the symptoms came back and I feel like I have the flu. My muscles scream with burning pain that is really intolerable. If I walk anywhere, I have to keep stopping an giving my muscles time to recover before going on a little further. That's it for Januvia.