I should stick with the Januvia. Several posters here ,including myself , had some side effects for 2 or 3 weeks wich then wore off. Some had headaches.
I had a slight headache at night BUT for the first few weeks I fell asleep or had to go to bed within half an hour of taking the pill.After that the effects wore off. I have had very good results with Januvia . Sorry , I know nothing of Galvus. but I have been taking Januvia for over a year now and it is extremely effective.
I think 3 days is far oo soon o consider coming off it.