.

ALPHA BLOCKERS AND H2-RECEPTOR ANTAGONISTS

Medical Diagnosis and Drugs, Medications
No important interaction occurs between cimetidine and alfuzosin, doxazosin, or tamsulosin.
No action needed. However, note that because tamsulosin levels are slightly raised the US manufacturers say that caution should be used, particularly with tamsulosin doses greater than 400 micrograms.
(3)