Hope this is helpful to you!
It should be taken as directed on the bottle.
We are not doctors and thus not able to comment on how drugs might interact with this product. We do know that because of its natural antibiotics properties, it is possible that beneficial gut bacteria may be damaged during use. We suggest following use of GSE with a quality probiotic.
The dose depends on the age of the child. I would start with one drop every four hours for those under six. If the child is 6-12, you could use two drops. Over 12 you could use the full dose. Make sure to mix with 8 oz of liquid!