The Physicians' Desk Reference (PDR) is the authoritative source of FDA approved information on prescription drugs. Although Immunocal is a natural, non‑drug supplement, it appears in the U.S. Physicians' Desk Reference. Immunocal is scientifically proven to raise glutathione. However, immunocal is also available without a prescription.

The CPS or Compendium of Pharmaceuticals and Specialties is published yearly and is distributed to Canadian Physicians and Pharmacists. Although Immunocal is a natural, non‑drug supplement, it appears in the CPS. Immunocal is scientifically proven to raise glutathione. However, immunocal is also available without a prescription.

Immunocal is listed in the U.S. Pharmacists' Red Book. Celebrating 110 years of service, the Red Book remains the Pharmacy's most reliable source for product information and prices on prescription drugs, OTC items, and reimbursable medical supplies.
For the complete text of the Red Book listing, please click here.