My 82 year old mother has taken Clonazepam for years and does well with it. She takes one small dose at night only, just for sleep. Her mail off RX company in Florida has been sending her Clonazepam and they look different from her old pills. The new pills are making her very sick at her stomach, causing vomiting. Are there ANY differences, at all, in manufacturers, even when the dosage is exactly the same?