Getting to know

As mentioned above, the most effective emergency treatment in an anaphylactic reaction is epinephrine (adrenaline). Epinephrine starts to work within seconds upon intramuscular injection and can save your life even in the most severe cases of anaphylaxis. It is the only emergency treatment that can stop the evolution of an anaphylactic attack and prevent life-threatening complications. 

Epinephrine is available in auto-injectors that can be carried easily and are very simple to use in an emergency. 

Any patient, who has had an anaphylactic reaction, or those with large localised allergic reactions to insect stings, should always carry an epinephrine (adrenaline) auto-injector with them.

In people who have experienced a generalized reaction (anaphylaxis) and have a medically confirmed allergy to insect venom, desensitization treatment (immunotherapy) might be recommended, especially for bee and wasp hypersensitivity. 
Immunotherapy is a long term treatment which seeks to change the reactivity of the immune system and to prevent the occurrence of an allergic reaction to the venom in case of a subsequent sting. The treatment involves administration of progressively increasing doses of the allergenic venom, up to a maintenance dose which is administered regularly at intervals of 4-8 weeks for a few years. People treated with immunotherapy develop a tolerance to the insect venom. Consequently if they are stung again they may not develop symptoms at all, or manifest only mild symptoms.