ABSTRACT
Prescription and non-prescription drugs are most commonly filled in solid dosage form. Because tablets and capsules make up the bulk of solid dosage forms, their calculations are highlighted in this chapter. These dosage forms are usually available in several strengths. If a capsule or a tablet of higher strength is prescribed but unavailable, two capsules or tablets of one-half the strength may be dispensed. Thus, a pharmacist or a health care professional may need to administer one-half or some other portion of the tablet, for example, if 500 mg Keflex® capsules are prescribed, and the pharmacist or a nurse has only 250 mg capsules. In such a case, twice the total number of capsules required should be dispensed with the clear instructions to take two capsules to the patients.
