My 15 week old LO was on 1 mL of Zantac twice a day for about 2 months. We are now trying to wean her off the medication. We cut the dosage in half to 0.5 mL twice a day 3 days ago on her doctor's orders, and her symptoms are worse than before she was even on the Zantac! Has anyone had experience with acid rebound when weaning from Zantac? About how long could the rebound last? We would really like to have her off these meds, but it is heartbreaking to see her like this. I regret ever giving her the Zantac to begin with. It was never this bad!