How much zantac (ranitidine) should a 7lb, 3 week old infant be prescribed?

Zantac (ranitidine) for babies: Usually at this age it is for reflux, under the supervision of a pediatrician/neonatologist, .5 ml of 15mg/ml twice a day given by mouth would be the dose. Zantac (ranitidine) is also used for other indications, as stress ulcer prophylaxis in neonatal intensive care units through other routes IV, under medical supervision,