Januvia and literally

I hve been on Januvia for 5 weeks, after not being able to tolerate Metformin. I have noticed a great thinning of my hair. Other than that I haven't felt better. Is hair loss a side effect?

I've been taking Januvia for 8 weeks, and have experienced muscle cramps with shock-like pain running down my leg into my heel; upper and lower GI spasms; night sweats with sleep interruption; and I gained 5 pounds in the first 4 weeks which I can't attribute to anything else. I've also taking metformin and glyset for several years, and although I've experienced the night sweats, they've greatly increased in intensity.