To prevent some unpredictable things, it is up to you to give us information about your health situation. It is important that you inform us of any medical conditions or prescription drugs that you are taking such as diabetes or asthma. Because the tour guides are in charge of your health and safety, so with having your health information, they would consider your situation in their plans.
As it was mentioned, all of our trucks are equipped with cooler boxes to keep drinks cool and fresh. It can be also used for maintaining your medicines along the trip. You should put your medicines in a hard plastic, watertight container. That way your medication wouldn't get wet and damaged.
On the way if you don't feel well, even a slight headache, please let us know. Needless to say that in the beginning, you may feel sick because of your body reaction to the new environment. So it would be common. Because we travel to far distances, we need to control everything in advance. So please inform your tour guide about everything you need before the trip started.
Emergency services are extensive in Iran, and response times are very good, 110 is the telephone number of the local Police control center, it is probably easiest to phone 110, as the local police have direct contact with other emergency services, and will probably be the only number with English speaking operators.