Hyperemesis Gravidarum: Next-Line Treatment When Promethazine Fails to Resolve Nausea and Vomiting

In hyperemesis gravidarum, severe persistent nausea and vomiting may not respond to an initial sedating antihistamine. When Promethazine does not achieve resolution of symptoms, a structured next-line protocol is indicated.

Previous Treatment That Did Not Achieve the Goal

The preceding line added Promethazine — a sedating antihistamine — with the specific goal of achieving full resolution of nausea and vomiting. Escalation to this protocol is triggered when that goal is not met.

Next-Line Approach

This protocol introduces a specific antiemetic therapy with defined limits on duration of use. The complete regimen — including which agent to select, the route, and applicable usage limits — is set out in the full evidence-based protocol.

Clinical goal: Resolution of nausea and vomiting.

Instant Access to Structured Evidence-Based Regimens

References

5-10mg tablet orally or by IM/IV injection three times per day. Maximum 30mg in 24 hours.

Maximum treatment duration of 5 days.

5-10mg tablet orally three times per day.

12.5mg by IM/IV injection 8 hourly.

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