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Okay, I am sorry to hear you are in this situation. I would avoid the medication unless it is prescribed by a doctor as it is quite a drug to use unless other options for constipation have failed.
Other than diarrhoea, there should not be any particular concerning side effects.
I am sorry, but I am confused from what you are saying. This would not be a police matter, neither would the police comment on medical matters.
Certainly if you have safe guarding concerns then social services are who you should speak to.
Well I hope you resolve the issues you are having. Take care.