DILTIAZEM HYDROCHLORIDE (diltiazem hydrochloride) This product information is intended only for residents of the United States. for Healthcare professionals:DILTIAZEM HYDROCHLORIDE, Vial U.S. Physician Prescribing InformationDILTIAZEM HYDROCHLORIDE - U.S. Medical Information Page - clinical & safety information, ways to contact Pfizer Medical & other resources Button previous Button next