Little baby girl symptoms and conditions

WOW Where to start. My 15 month old Daughter was put on it for "SUPPOSED" allergies which she don't have... But that's a totally different story. Anyways she was put on the granules. After taking if for about 5days I noticed VERY Significant side effects IMMEDIATELY. She would NOT eat for anything in the world which is odd because my 25lbs 15 months old (Mind you she was only 5lbs 4ox @ birth) was a Pigglet lol She also became VERY Winey & Clingy...She also began to have "Night Terrors' and when I say Night terrors I mean the full blown ones last about 20 minutes or so and the first one scared me to death I thought my little baby girl had went blind. The terrors started about Night 2. We took her off the Singulair before I found any of these Side Effect write ups and of course AGAINST Doctor's advise however I put her back on her Claritin. Her nose is drying up and Congestion is gone after rushing her to the ER with 104.2 fever and got her on Anti-Biotics & Albuterol. (Still another story lol) We noticed the next day a HUGE Difference is her personality and she was sooo HAPPY again. The first full day off the drug she slept through the night in her own bed WITHOUT a terror or even a bad dream. IT'S A MIRACLE I proclaimed that I had enough common sense after only 4days to get that mess out of my Daughter's Body. Needless to say she is a piglet again here only about 5 days after taking her off the med. and happy as a 15 month old should be lol