Haloperidol conversion oral to im?

There isn’t a precise 1:1 conversion from oral to intramuscular (IM) haloperidol. A practical approach used in many settings is to use about half the daily oral dose as the IM dose when you need an IM dose for breakthrough symptoms, with adjustments for the acute situation.

Guidelines you can use (general rules, not a substitute for local protocol):
- Oral to IM equivalence (rough): IM dose ≈ PO daily dose × 0.5–0.6.
- Example: PO 10 mg daily → IM 5–6 mg per dose (commonly 5 mg is used).
- Acute agitation or delirium management:
- Start with 5 mg IM.
- If needed, may repeat after 10–20 minutes (often not exceeding 10 mg per dose and 20 mg in 24 hours; follow local guidelines and patient factors).
- In elderly or frail patients, start lower (e.g., 2.5 mg IM) and monitor closely.
- Safety considerations:
- Haloperidol can prolong the QT interval and cause extrapyramidal symptoms (EPS); risk is higher with higher doses and with other QT-prolonging drugs.
- Be cautious in elderly, those with cardiac disease, hepatic impairment, or Parkinsonism.
- Use caution when combining with benzodiazepines due to sedation and respiratory risk.
- If you’re converting for long-term treatment rather than acute agitation, the exact conversion depends on the reason for switching and the clinical setting; many clinicians taper from PO to IM using the above rough equivalence for bridging, then re-evaluate.

If you share the patient’s current oral dose, indication (e.g., acute agitation vs. maintenance), age, and any relevant health factors, I can tailor a more specific example. Also, consider checking your institution’s formulary guidelines.