A child weighing 27 kg is prescribed Keflex (cephalexin) 150 mg orally once daily. The recommended dose range for children is 25 to 50 mg/kg/day, and the medication label states 125 mg per 5 mL. What is the safe dosage range in milligrams per day for this child, and does the ordered dose fall within this range?

A. Subcutaneous: Subcutaneous injections deliver medication into the fatty tissue beneath the skin. This route is used for vaccines like MMR or insulin in some cases but is not appropriate for TB skin testing, as it does not produce the localized reaction needed for accurate reading.

B. Intradermal: The TB (Mantoux) test is administered intradermally, just beneath the epidermis, to elicit a localized immune response. Proper placement allows formation of a raised wheal, which can be measured 48–72 hours later to determine exposure to Mycobacterium tuberculosis.

C. Enteral: Enteral routes involve the gastrointestinal tract, such as oral or via feeding tube. This route is not suitable for TB testing, as the immune response must occur locally in the skin for accurate interpretation.

D. Intramuscular (IM): IM injections deliver medication into muscle tissue, providing systemic absorption for vaccines or medications. This route is not used for TB testing because it would not create a localized dermal reaction necessary for evaluation.

A. The medication should be given every four hours: Administration every four hours is indicated by the abbreviation Q4H, not STAT. This schedule reflects routine dosing rather than an urgent intervention.

B. The medication should be given after the next meal: Timing after meals is specified by the abbreviation PC (post cibum). STAT does not relate to meal timing or routine administration.

C. The medication should be given twice a day: Twice-daily administration is indicated by BID (bis in die). STAT orders override routine schedules and require immediate action.

D. The medication should be given immediately and only once: STAT indicates that the medication must be administered as soon as possible, typically for an acute or emergent condition. In this case, sublingual nitroglycerin is given immediately to relieve chest pain and prevent myocardial ischemia.