This is the second time my 9 month old has been prescribed this a...

This is the second time my 9 month old has been prescribed this antibiotic. The fist time, she was 5 months old and after 3 days had a 'rectal fissure' (supposedly since she had a positive test for bloody stool) and the medication was discontinued. Just about two weeks ago, she was prescribed it again. She had the red/rusty stools and I took her in and it was negative for blood. She has been refusing to eat and extremely irritable. After 7 days of this antibiotic, I took her back in for a recheck. Her ears were clear and the antibiotic was discontinued. She has been off of the antibiotic for 5 days now and is still irritable, having explosive diahrea diapers 4 to 5 times a day and refusing to eat. Currently we are monitoring her for dehydration and giving only pedialyte for feeds. She has had a total of 16 ounces yesterday and had 13 ounces today. She has had continued diahrea and has had 2 very barely wet diapers now. My four year old was on this medication a couple of times and never had any trouble. I am concerned however about the reactions that have been experienced this time around. I hope that no other parent has to endure this with their child. Personally, I will request something other than Omnicef in the future.