Patients & CaregiversHealthcare ProfessionalsWorldwide
HomeAbout MerckProductsNewsroomInvestor RelationsCareersResearchLicensingThe Merck Manuals
THE MERCK MANUAL MEDICAL LIBRARY: The Merck Manual of Diagnosis and Therapy
Tips for better results
ABCDEFGHI
JKLMNOPQR
STUVWXYZ
Sections
Resources
Index
h1h2hahdhehfhihlhmhohphthuhy
Type in the first few letters of a word to get there faster:
Go

H1

H1 blockers

see Histamine1 blockers

h1h2hahdhehfhihlhmhohphthuhy
Audio
Figures
Photographs
Tables
Videos
Contact UsSite MapPrivacy PolicyTerms of UseCopyright 1995-2007 Merck & Co., Inc.