Lorazepam is NOT indicated for nausea in children
Lorazepam (Ativan) should not be used for nausea in a 26 kg child. There is no established pediatric dosing for lorazepam as an antiemetic, and the evidence does not support its use for this indication in children.
Why Lorazepam is Inappropriate for Nausea
The available guideline evidence 1 provides clear pediatric lorazepam dosing only for specific indications:
- Psychosis with agitation: 0.05–0.15 mg/kg IM/IV (maximum 5 mg single dose)
- Sedation/anxiolysis: Not specifically detailed in the pediatric emergency guidelines
Research data 2 evaluated low-dose lorazepam (0.03 mg/kg IV) in children aged 2.8–14.2 years and found effects on anxiety and selective anterograde amnesia, but nausea was not studied as an indication. Another study 3 examined oral lorazepam for premedication at 0.04–0.06 mg/kg and actually noted pre-operative vomiting as a side effect of oral administration.
Critical Safety Concern with Sotalol
The concurrent use of sotalol creates additional risk. Sotalol is a Class III antiarrhythmic that prolongs the QT interval 4. While lorazepam itself does not directly prolong QT, benzodiazepines can cause:
- Respiratory depression
- Hypotension (which could be problematic with sotalol's potential for bradycardia and hypotension)
- Sedation that may mask cardiac symptoms
The sotalol labeling 4 emphasizes careful QT monitoring and warns about multiple drug interactions, though benzodiazepines are not specifically contraindicated.
Recommended Approach
Use evidence-based antiemetics for pediatric nausea instead:
- Ondansetron (first-line for most pediatric nausea)
- Metoclopramide (if gastroparesis suspected)
- Promethazine (age >2 years)
If anxiolysis is the actual underlying need (anxiety manifesting as nausea), consider:
- Non-pharmacologic interventions first
- If medication necessary, consult pediatric cardiology given the sotalol therapy before adding any sedative
Monitor the child on sotalol for:
- QT interval (should be <500 msec) 4
- Heart rate and blood pressure
- Renal function (affects sotalol dosing)
The absence of evidence supporting lorazepam for pediatric nausea, combined with the theoretical risks in a child on QT-prolonging medication, makes this an inappropriate choice. Address the nausea with appropriate antiemetics and ensure the underlying cause is identified.