AllerTan and arms and legs

Maybe it was just a one-in-a-million thing, but I will never, ever touch this medication again. My 2-year-old son tolerates other meds very well with no problems but when we gave him this, he freaked out like he were on an acid trip at a Grateful Dead show. I checked and double-checked the dosage and gave him 2.5 mL (he weighs about 36 pounds), which was the correct amount. He grabbed at invisible floaters, beat wildly at his arms and legs because "there were bugs all over him," and screamed and pointed at things he imagined were trying to get him. I cannot recommend this drug to any young child based on my experience. I hope that his reaction was just a rare aberration but regardless, we'll never touch the stuff again.