The injections are gradually increased in strength until the patient can tolerate a few stings without having an allergic or systemic reaction. Immunotherapy is a complicated procedure and the patient will require numerous injections.
Many experts recommend the injections for at least ten years.
Others argue they are needed for life. People who have participated in an immunization program for several years and then dropped out have experienced severe reactions in later life following a sting. These kits contain a pre-measured dose of the drug epinephrine that can temporarily halt the onset of severe systemic reactions. Sting kits are not designed to replace expert medical care but hypersensitive persons should carry a kit with them at all times. A medical alert bracelet indicating venom sensitivity should be worn as well.