The point isn't whether the word narcolepsy appears (I only mentioned it due to the "closing eyes" phrase), restarting doses of meth is not warranted in almost no context except a life-or-death withdrawal episode (i.e. like a person pointing a gun towards another person for getting meth).
That's your opinion. I disagree with it, and seemingly I'm not alone. Since real humans actually agree with the suggestion of taking meth in this instance, it's not reasonable to expect LLMs to align to your specific opinions here.
I thought we were talking about outcomes, not opinions. Are those other humans doctors? Is there the clinical research or guidelines to backup giving meth to a person in withdrawal syndrome?
Tapering is the keyword you are looking for. Gradually reducing the dose is a well known method for minimizing withdrawal issues. It has both pros and cons compared to quitting cold turkey. I think a real doctor would probably first get the patient on a less addictive stimulant and then taper that one.
I'm pretty sure doctors are not legally allowed to tell a patient to take illegal drugs, even in a hypothetical situation where they might think it's a reasonable choice.