Histamines are more (over-the-counter type) or less (prescription only)
 generalized.  They will relieve the symptoms (and all have some side
 effects) but not prevent the production of allergens which, in turn,
produce
 the symptoms.  The only way to reduce the production of allergens ("cure")
 is through gradual exposure to the underlying ingredients so that the
immune
 system no longer recognizes them as 'foreign'.


The above paragraph contains some errors. Allergy medications contain
*anti-histamines* which alleviate symptoms. *Allergens* are substances like
pollen, mold, spores, etc. that produce allergic reactions, including the
formation of histamine in the body, which in turn produce symptoms like
running nose, swelling, etc.

*Anti-histamines* suppress the reaction to allergens and alleviate
(somewhat) the symptoms. Some medications have no noticeable side effects;
others produce drowsiness (dipheniramine) or sleeplessness
(pseudoephedrine).

Some people report spontaneous "cures" as a result of a change in location;
others report "outgrowing" their allergy. Others have successfully become
desensitized by a series of injections of the suspected allergens. Some
report no success by any means and must rely on symptom-relieving products.

pb