» Rifampin Oral Suspension contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of rifampin (C43H58N4O12). Use Rifampin or the number of Rifampin Capsules that contain the designated amount of Rifampin, and prepare Rifampin Oral Suspension as follows (see Pharmaceutical Compounding—Nonsterile Preparations 795):

Transfer 1.20 g of Rifampin, or the contents of Rifampin Capsules, into a mortar. [note—If necessary, gently crush the Capsule contents with a pestle to produce a fine powder. ] Add about 2 mL of Syrup to the mortar, and triturate until a smooth paste is formed. Add about 10 mL of Syrup, and triturate to form a suspension. Continue to add Syrup, until about 80 mL has been added. Transfer this suspension to a 120-mL precalibrated light-resistant glass or plastic prescription bottle. Rinse the mortar and pestle with successive small portions of Syrup, and add the rinses to the bottle. Shake vigorously. If necessary, add Citric Acid or Sodium Citrate to adjust to a pH of 5.0. Add a suitable flavor if desired. Add sufficient Syrup to make the product measure 120 mL, and shake vigorously to produce the Oral Suspension.