The medication that would most likely help would be tapering the antidepressant medication, as the patient's signs indicate an overdose.
An antidepressant should generally be started at the lowest effective dose and gradually increased until complete control of depression (or anxiety) is achieved. The speed and dose of the increase can only be determined by the psychiatrist (and will depend on each person, their age, , other associated diseases, etc.).
With this information, we can conclude that the medication that would be most likely to help would be tapering the antidepressant medication, as the patient's signs indicate an overdose.
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