A freeze-dried form of bee venom is available in the US as a perscription
drug.  The venom is re-ydrated such that 1 ml = the equivalent dose of 1 bee
sting, and this is injected into the patient.
 
This was what was given to me when I underwent bee sting allergy
desensitization.  It hurts less than a bee sting.
 
W. G. Miller
Gaithersburg, MD