HAY FEVER-A Comparative Clinical Evaluation of Treatment with Aqueous Pollen Extracts, Alum-Precipitated Pyridine Pollen Extracts and Aqueous Pollen in Oil Emulsions.

Three different types of pollen extracts are currently being used in the prophylactic treatment of hay fever. A comparative clinical study of their efficacy reveals that all are about equally efficacious. The alum-precipitated pyridine pollen extracts may be slightly better. Since only 14 to 16 injections are required for prophylactic treatment, they may well replace the older aqueous pollen extracts, 20 to 35 injections of which are usually necessary to provide relief. The aqueous pollen in oil repository method of treatment needs only one to four injections for comparable results, but this so-called "one-shot" treatment can only be administered by one who is trained in emulsion therapy and has come to know by experience the proper maximum dose.