<s>[INST] My sister is taking Galantamine ER 16. She has been taking this for the past 4 years. It seems to be working well. The only problem is lately, I have noticed that sometimes the galantamine is not dissolving in her system-it is coming out whole in her stool. I don t know why. I can not tell that it is happening enough to throw her behavior or memory off. What should I do? [/INST] Hello!Welcome on HCM!Regarding your concern, I would explain that as her clinical situation seems to be improved there is nothing to worry about. The drug has showed good effects on her clinical situation. Regarding her stool could you please specify why you think that the drug is not being absorbed? Does she have diarrhea? This could be a possible adverse effect related to Galantamine. I would recommend consulting with her prescribing doctor for a physical check up and some cognitive tests. If her situation is evaluated to be improved there is nothing to worry about. In case of diarrhea she may need to switch to another drug because of intolerance. Hope to have been helpful!Best wishes, Dr. Aida </s>