My 11 month old has been on Zantac since he was approx 4 months old. I recently stopped giving the medication to him and now all of a suddden he is drinking a lot less. He is not even taking half of the bottle. I do not know if this is due to him still having acid relux or if he is teething. I know I need to start weaning him off of the bottle but he still needs liquids and this is rather sudden.