Books like Essentials of Medical Pharmacology
K. D. Tripathi, Essentials of Medical Pharamcology 6th edition
Essentials of Medical Pharmacology is 890 pages, about 16 hours 19 minutes at 250 words a minute.
7 books to read next
How long each takes
Handbook of Pharmaceutical Excipients 16.8 h Basic Physical Pharmacy 10.9 h 
Physicochemical Principles of Pharmacy 9.0 h 
Clinical Chemistry 13.2 h 
Clinical Psychopharmacology Made Ridiculously Simple 1.4 h 
Remington 44.2 h 
Handbook of Basic Pharmacokinetics-- Including Clinical Applications 9.1 h Bar height shows length. Estimated at 250 words a minute.