It's hard to say just how useful this Guide to the Selection and Use of Medicines You Can Get Over-The-Counter Without Prescription, for Safe Self-Medication really will be. This in spite of the fact that the authors (a pharmacologist and a Chief of Internal Medicine at Lowell General Hospital in Massachusetts) are soundly accredited and that the general sections of advice preceding the specifics are firmly instructive. And topically well organized -- the common cold, drugs for children, stomach and abdominal discomforts, pain, insomnia, allergy, skin, feminine hygiene and eye, ear, nose, throat and mouth. With more general discussion at the close. But the authors do not consumer union-direct you into what to buy (take, for example -- diaper rash) -- the product you purchase should contain one or more of 11 ingredients; the proprietary preparations then listed, 28 in ail, will contain one or more of the above 11 but which are the most valuable ingredients? often they contain other ingredients. The percentages vary and should one look for a greater or lesser amount? Are certain combination forms more valuable than others? You will find yourself ignorantly questioning the acquisition of Pertussin 8 Hour Cough Formula (Contains dextromethorphan hydrobromide, sodium citrate, ammonium chloride, chloroform 0.3% and alcohol 9.5% by volume) versus Pertussin Plus (Contains acetaminophen, dextromethorphan hydrobromide, phenylephrine hydrochloride, chlorpheniramine maleate, and alcohol 25%) versus Pertussin Wild Berry Cough Syrup (Contains dextromethorphan hydrobromide, sodium citrate, ammonium chloride, alcohol 8.5%, and chloroform 0.2%). -- Problematic.