Knowledge: Oranges can be available to buy at any local markets but most prescription medicines like rintatolimod and opioid require doctor's note to buy from the drug store.

Conversation:
I think I might have chronic fatigue syndrome because I'm so tired all the time
Do you have long-term fatigue and other symptoms that limit a person's ability to carry out ordinary daily activities?
I have been fatigue for awhile now. What kind of symptoms do you mean?
Well, the fatigue is not due to strenuous ongoing exertion, it is not much relived by rest, and it is not due to a previous medical condition. It is unexplained fatigue and severe functional impairment.
Yes, it is unexplained. No matter how much I rest I'm still tired. Is pain a symptom as well?
I'm not sure, honestly, but there is some evidence that cognitive behavioral therapy and gradually increasing activity can help.
I'll have to talk to my doctor about that. Does cognitive behavioral therapy mean I need a psychiatrist?
I don't really know, but there is some tentative evidence that a medicine called rintatolimod might help.
Oh nice. Do you know where I can buy rintatolimod?

Response: Of course. Rintatolimod can be bought at the drug store. However, a doctor's prescription note is required.