Life is unpredictable, so you should take care of your health! An individual first aid kit usually contains painkillers, antipyretics, and antihistamines. Also plasters and antiseptics, gloves and bandages for treating wounds. Your family doctor will help you clarify the names of the medications.
To avoid unnecessary use of the first aid kit, do not collect and, of course, do not eat mushrooms that you do not know - this is dangerous! Especially where there is no access to medical care. The same applies to the consumption of berries and various fruits in the forest. If you are not sure whether a mushroom you find is poisonous or not, do not touch it. It’s better to take a photo of your find as a souvenir, and later find out what kind of species it is from a specialist - a mycologist.