Treatment of nausea and vomiting associated with cerebellar infarction using the traditional herbal medicines banhabaekchulcheonma-tang and oryeong-san: Two case reports (CARE-complaint).

Rationale: Metoclopramide is commonly used to treat nausea and vomiting. However, long-term administration of metoclopramide is associated with various adverse effects, and its therapeutic effects are short-lasting. Hence, traditional East Asian medicine has received increasing attention as a short-term strategy for treating these symptoms.

Patient Concerns: The present report discusses the cases of a 71-year-old man and an 80-year-old woman diagnosed with cerebellar infarction. Both patients reported nausea and vomiting, which appeared during hospitalization following cerebellar infarction.

Diagnoses: One patient was diagnosed with a left cerebellar infarction and hemorrhagic transformation, while the other was diagnosed with a bilateral cerebellar infarction.

Interventions: Both patients took Banhabaekchulcheonma-tang (BT) and Oryeong-san (OS) extracts.

Outcomes: The patient in Case 1 experienced a rapid decrease in nausea from day 5 of BT and OS administration, and metoclopramide was discontinued on day 7. The patient in Case 2 experienced a clear decrease in the number of vomiting episodes from day 6 of BT and OS administration and did not take metoclopramide thereafter.

Lessons: Other than drugs used to mitigate symptoms, there are no suitable treatments available for nausea and vomiting caused by cerebellar infarction. In the present cases, nausea and vomiting remained unresolved even after 3 weeks of treatment with conventional therapies; however, these symptoms significantly improved after administration of the traditional East Asian herbal medicines BT and OS, and there were no recurrences. These cases demonstrate that traditional herbal medicine can reduce the side effects associated with long-term administration of metoclopramide and help patients resume their daily lifestyle. In addition, BT and OS treatment can facilitate administration of other drugs, highlighting its potential to aid in the treatment of stroke. Further research including relevant clinical trials is required to obtain more conclusive evidence.