Mommies, is anyone here giving Bifidumbacterin?

Mommies, is anyone here giving Bifidumbacterin? How much did you give? How quickly did it work? We don't have a normal pediatrician in our village because she's on vacation 12 times a year ? She caught us by chance at the appointment and said to give one bottle once a day. I googled reviews, all good, and that it's good for premature babies too... So I was afraid to give one bottle, and gave 2 tsp. But my stomach growled loudly, cried a lot, now it stopped, hopefully ? I want to give one bottle tomorrow, 7 days. All because we have constipation, we can't go for 7-8 days.