A nurse is providing teaching to a client who has a prescription for amoxicillin 10 mL PO. How many teaspoons (tsp) should the nurse instruct the client to take?

Choice A reason: 0.5 tsp is equivalent to 2.5 mL because 1 teaspoon equals 5 mL. If the client were instructed to take only 0.5 tsp, they would receive only 2.5 mL of the prescribed 10 mL dose. This would result in significant underdosing, which could lead to ineffective treatment of the infection and contribute to antibiotic resistance. Therefore, this option is incorrect. Choice B reason: 1 tsp equals 5 mL. If the client were instructed to take 1 tsp, they would only receive half of the prescribed 10 mL dose. This underdosing would not achieve therapeutic levels of the antibiotic in the bloodstream, leading to poor infection control and possible worsening of the condition. Thus, this option is also incorrect. Choice C reason: 2 tsp equals 10 mL because 1 teaspoon is 5 mL and multiplying 5 mL × 2 = 10 mL. This matches the exact prescribed dose of amoxicillin. Administering the correct dose ensures therapeutic effectiveness, eradication of the infection, and prevention of antibiotic resistance. This is the correct answer. Choice D reason: 3 tsp equals 15 mL. If the client were instructed to take 3 tsp, they would receive 5 mL more than the prescribed dose. This overdosing could increase the risk of side effects such as gastrointestinal upset, diarrhea, or allergic reactions. Overdosing antibiotics also increases the risk of toxicity and is not safe. Therefore, this option is incorrect.