Method of improving the absorption of injected antibacterial substances

摘要

An antibacterial substance which does not have optimum absorbability and is administered parentally into tissue, is administered to a host in conjunction with a benzylamine derivative of the formula <IMAGE> wherein R1 is hydroxyl in the 2- or 4-position or amino in the 2-position; R2 is hydrogen or alkyl of 1 to 3 carbon atoms; and R3 is cyclohexyl optionally substituted by hydroxyl; or a non-toxic, pharmacologically acceptable acid addition salt thereof, to improve the absorption of the parenterally administered antibacterial substance.