Has anyone gave their child Regalin?

Its a medicine used for acid reflux. My daughter has an extreme case of acid reflux and she is on Regalin 1 ml every 6 hours and omeprozale 4ml twice a day. I read that if Regalin is used for long periods of time it can cause irreversable involuntary body movements. I was just wondering if this is true or if anyone else used this for their child. it is only recommended to be used for 3 weeks. My daughter has been using it for 7 months and she is 9 months. Her case is so extreme i just dont know what to do. Because without the medicine she is in terrible pain