If such patients come to me, I usually prescribe nux vomica 200c once a day dose for 2 to 3days (depending on how long the remedy is taken) nux vomica is the common antidote for many remedies, however I would still consider the totality of the patient at period of time.
Also you can prescribe strong coffee for 2-3 days, this helps to nullify the effects of remedies.
I have never tried aloe only as a antidote, I have only prescribed aloe if the totality has matched up..
I guess if aloe comes up after taking the complete totality of the patient, then you should prescribe it.
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