The 34th edition of PDR for Nonprescription Drugs is the most comprehensive and valuable to date. The 2013 book offers an updated guide to hundreds of the most commonly used over-the-counter medications, including analgesics, cough and cold preparations, fever reducers, allergy medications, and more. Organized for easy use, PDR for Nonprescription Drugs offers comprehensive drug information such as usage, dosage, warnings and precautions, side effects, ingredients, and more.