Amoxil 375mg po BID. Pharmacy dispenses 150ml of Amoxil 250mg/5ml. How many days will it last? Oct 06, 21 02:45 PM. A patient has a prescription for Amoxil 375mg po BID. The pharmacy dispenses 150ml of Amoxil 250mg/5mL suspension. How many days would the medication last. Read More.