On average, more than 70% of the drugs found in PDR have updated prescribing information from that found in the previous year's edition. This means that each year thousands of changes are made to: Interactions with other drugs - Contraindications - Side Effects - Black box warnings - Recommended dosages - How-supplied methods. With the new 2004 PDR, you'll find the most complete, up-to-date information on over 4,000 drugs by brand and generic name (both in the same convenient index), manufacturer and product categories plus more than 2,000 full-size, full-color photos cross referenced to the drug. The retail edition of the 2004 PDR includes a mail in coupon for a FREE PDR Electronic Library on CD-ROM. This valuable CD-ROM includes the full-text information of the 2004 Physicians Desk Reference, PDR For Nonprescription Drugs and Dietary Supplements and the PDR For Ophthalmic Medicines. As an added bonus, the PDR on CD-ROM also includes a Drug Interactions module that allows the user to check multi-drug regimens for potentially dangerous interactions. That's over $280 worth of print information on one CD-ROM. The 2004 PDR also includes valuable information on how qualified healthcare professionals can access MobilePDR, PDR's abbreviated drug information for PDA applications as well as full text PDR information on www.pdr.net.