My dad is on Galantime Hydrobromide 24 mg. He ran out of the medication and went three days without the medication. He has been back on it for five days, but is not himself. He is depressed, has mood swings, sometimes yelling and cursing, is telling crazy stories that he thinks really happened, confused, etc. Could being off the meds for three days being causing this? How long does it take to get out of his system, and how long before it builds back up in his system?