b. gather patient information
Patient information is needed before continuing treatment.
Gathering patient's information is the first step of drug addiction treatment, the correct option is b.
Substance use psychosis, also known as drug addiction, is a disorder that affects a person's brain and behavioral patterns, lacking the ability to control the use of a particular drug or medication.
For this it is of utmost importance to gather the information about the patient to start the treatment.
Thus, the correct option is b.
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