If it is b2c: make an app for the phone.
Screen1: human body, where you can choose places where you feel unrest.
Screen2: describe what is wrong
Screen3: "based on your answers and your geolocation you can get these 3 remedies which are safe" or if something extreme is going on "please see the doctor, in the mean time you can use aspirin to relieve your pain"
*I usually call mom when I have headache, temperature or diarrhea cause I constantly forget which one should I take. I'm 30:-( I would use such app for these hints. For anything more serious I would go to doctor and wouldn't self medicate.
Monetization(Hard): Subscription for extra features like tracking of drug dosages and keeping track of your home stock. Would probably be beneficial to someone who takes a lot of drugs all the time.
Monetization2(Medium hard): deals with local pharmacies to be able to provide recommendations where to buy a specific drug advised by the app.
Based on screenshots what he built is b2b app for doctors?