Get the Lonely Planet Trekking in the Nepal Himalaya guidebook (available immediately online in electronic form from LP website). They have a good medical section. Diamox, antibiotics etc are easily and cheaply available over the counter (no Rx needed) in pharmacies in Kathmandu and Pokhara.
Make sure you are up on you routine and travel-specific vaccinations.
If you really are in Vancouver, the Vancouver Coastal Health travel clinic is good for advice (including first aid kits and vaccinations (http://travelclinic.vch.ca/). (However, because we usually travel through Bangkok, we get pricier vaccinations at the thai travel clinic at the Hospital for Tropical Diseases in Bangkok. Excellent and much less expensive.)Edited: 13 November 2018, 07:33
10 days for a short AC trek is very tight and leaves no spare time in case of delays caused by minor illness or injury. Also the flights from Jomsom to Pokhara are subject to frequent delays caused by adverse weather which can last days at a time. It's my assumption that you are flying with 10 days available but if not the road journey can also be subject to delays e.g. landslide blockages.
More time for the trek is better. How much time do you have in Nepal?
The NATT Guide has a fast itinerary:
There is a more up to date available to purchase, hard copy and download.
A typical first aid list can look like this:
Diamox altitude tablets (optional)
Paracetamol or Ibuprophen tablets for headaches and pain killer
Anti-inflammatory drugs for leg joint, back and muscle strains
Medicine for food poisoning, stomach parasites and diarrhoea (tindazol, ciprofloxacin and lomatil)
Antihistamine tablets for colds, allergy and insect bite reaction
Ventalin inhaler (optional for asthmatic breathing attacks)
Sun cream 15-30 SPF, antiseptic cream, vaseline or moisture cream
Band aides or larger sticky patches for foot blisters, small bandage roll
Small surgical scissors for treating blisters and cutting nails