Hi M.,
Can I just say....OMG its not that big of deal!!!!!!!!!! First of all, Yes it can have a reverse affect, thats why you try it PRIOR to flying to see, You would use about 3mls. I give it to my daughter WITH DOCS APPROVAL and she sleeps like a charm. Not something you should use forever but for certian things its fine, My little one is 23 lbs and she gets the 3 1/2 mls and does just fine, dont let people freak you out for no reason. Yes babies die from overdoses ok but it can happen with anything, tylenol, motrin, all natural products, even water for crying out loud, ANYTHING, soloution.... DONT OVERDOSE!!!!!!!! Use a proper amount, same with anything else in this world. Anyways I just felt I should let you know, I hope you have a great trip and I hope you dont get discouraged because of what other people tell you!