Allopurinol Oral Suspension
»Allopurinol Oral Suspension contains not less than 90.0percent and not more than 110.0percent of the labeled amount of allopurinol (C5H4N4O).Prepare Allopurinol Oral Suspension at a 2%concentration,for example,as follows (see Pharmaceutical Compounding—Nonsterile Preparations á795ñ).
Allopurinol 2g
Glycerin 5mL
Vehicle for Oral Suspension 45mL
Vehicle for Oral Solution,a sufficient
quantity to make		 100mL
Select the number of Tablets that contain the specified amount of Allopurinol and calculate the quantity of each ingredient required for the total amount to be prepared.Accurately count/weigh/measure each ingredient.Thoroughly pulverize the tablets.Mix the powdered Allopurinol Tablets and Glycerin to form a smooth paste,incorporate the Vehicle for Oral Suspension,add sufficient Vehicle for Oral Solution to volume,and mix well.Adjust the pH,if necessary.Package,and label.
Packaging and storage— Package in a tight container,and store at controlled room temperature.
Labeling— Label it to state that it is to be shaken well before use and that it is to be discarded after 60days.Label it to state that it is to be kept out of the reach of children.Label it to indicate the nominal content of allopurinol in the Oral Suspension.
pHá791ñ: an apparent pHbetween 6.5and 7.5.
Beyond-use date: not more than 60days after preparation.
Auxiliary Information— Staff Liaison:Claudia C.Okeke,Ph.D.,Associate Director
Expert Committee:(CRX)Compounding Pharmacy
USP28–NF23Page 67
Pharmacopeial Forum:Volume No.29(4)Page 1000
Phone Number:1-301-816-8243