Hello Doctor.I am writing to seek advise for my four year old boy Few weeks ago he complained of stomach ache, which increased in frequency... We were visiting from the USA to Delhi, and are still in Delhi The Doctor who was consulted said that it is because of the change and gave him Nutrolin B. That seemed to help for a day, but then he got loose motions. He was then started on ZiFi for 5 days. While on ZiFi he seemed fine, but soon after (in 2 days) he had a relapse. He was put on ZiFi again for 7 days, and again while on ZiFi he was perfect: no stomach ache, OR loose motions. But since yesterday, he started complaining of stomach ache again, and today had a little loose motion too. Please advise,...I am very concerned