I Just Start Taking Januvia 100 Mg. And I Notice

i just start taking januvia 100 mg. and i notice how it makes me feel within 3 days of taking this medication. My body feels like a person taking antibiotic going through your system trying to get an allergic reaction. Its a very uncomfortable feeling . I think the dose can be lower to 50. I did not take the medication yesterday because I want some of the medicine to leave from my system. What can I do.