Medical facilities are available according to the tourist seasons. During the season time there are basic altitude clinics at certain places as Gokyo and Pheriche, there is health post in Namche and Lukla.
Besides the season time there are pharmacies in Namche and Lukla, and a small hospital in Khumjung. However, you need to carry a First Aid and bring all your personal medicines you need. (First aid will be provided by Nepal Sanctuary Treks), also your guide will be trained for first aid in case of emergency.