Gerald is currently in the compounding lab and looking for the best capsule size he can use to fill 1.4 g of sodium carbonate powder in. Which of the following capsule sizes he can use?

Hard gelatin capsules are standardized shells used in pharmaceutical compounding to enclose solid or semi-solid medications. Capsule sizes are identified by numerical codes ranging from 5 (smallest) to 000 (largest). The filling capacity depends on the bulk density of the powder and the degree of packing. Selecting the correct size is vital for ensuring dosage accuracy and patient compliance during medication administration. Rationale: A. Size 2 capsules are relatively small, with a typical volume capacity of approximately 0.37 mL. Depending on the powder's density, they usually hold only 200 to 300 mg of material. They are entirely insufficient for a high-dose requirement of 1.4 g of sodium carbonate, requiring the patient to take multiple small doses. B. Size 00 capsules are large, holding about 0.91 mL of volume, but they generally cap out at approximately 600 to 900 mg for most powders. While they are common for supplements, 1.4 g exceeds the physical volume available in a single 00 shell. Gerald would need a larger vessel to accommodate the 1400 mg dose. C. Size 1 capsules are intermediate in size with a volume of about 0.50 mL. They typically hold 300 to 500 mg of powder, which is far below the therapeutic dose requested in the scenario. Using this size would necessitate four or five separate capsules, which is inefficient in a compounding lab setting. D. Size 0 capsules are a standard large size for adults, holding approximately 0.68 mL. They generally accommodate 400 to 600 mg of powder depending on density. For 1.4 g of sodium carbonate, a size 0 capsule is physically too small to contain the bulk mass of the chemical without excessive compression. E. Size 000 is the largest capsule size available for human use, with a volume capacity of approximately 1.37 mL. It is the only size capable of holding a mass as large as 1.4 g (1400 mg) of a standard density powder in a single unit. This maximizes dosage efficiency and ensures all the powder fits within the gelatin shell.