What is the stated oral dose equivalence between chlorpromazine and loxapine?

What is the stated oral dose equivalence between chlorpromazine and loxapine?

• A. 100 mg chlorpromazine equals 20 mg loxapine
• B. 50 mg chlorpromazine equals 10 mg loxapine
• C. 200 mg chlorpromazine equals 40 mg loxapine
• D. 150 mg chlorpromazine equals 30 mg loxapine

Answer: (A)

Potency-based dose conversion guides how we translate one antipsychotic dose to another when switching meds. Loxapine is roughly one-fifth as potent as chlorpromazine, so the commonly cited equivalence is that 100 mg of chlorpromazine corresponds to about 20 mg of loxapine. This 100 mg:20 mg ratio is the standard reference used in pharmacology texts and exams to represent the stated oral dose equivalence. The other pairings reflect the same 1:0.2 ratio but aren’t the canonical stated value relied on in practice, so the remembered standard is 100 mg chlorpromazine equals 20 mg loxapine. Keep in mind these conversions are approximate guides for switching therapy, not exact equivalents for every patient.

Potency-based dose conversion guides how we translate one antipsychotic dose to another when switching meds. Loxapine is roughly one-fifth as potent as chlorpromazine, so the commonly cited equivalence is that 100 mg of chlorpromazine corresponds to about 20 mg of loxapine. This 100 mg:20 mg ratio is the standard reference used in pharmacology texts and exams to represent the stated oral dose equivalence. The other pairings reflect the same 1:0.2 ratio but aren’t the canonical stated value relied on in practice, so the remembered standard is 100 mg chlorpromazine equals 20 mg loxapine. Keep in mind these conversions are approximate guides for switching therapy, not exact equivalents for every patient.