ABSTRACT
<b>Purpose</b>: Hiccups are a symptom that often appear in lung cancer patients during medical treatment. Although various drugs and non-pharmacologic therapies are used to treat them, they often are not effective. We report 2 cases of successful treatment for refractory hiccups due to chemotherapy for lung cancer using pregabalin. <b>Case report</b>: Both patients had advanced squamous lung cancer. That in case 1 was treated using chemotherapy with carboplatin and paclitaxel, while the case 2 received nedaplatin and irinotecan. Hiccups occurred and became exacerbated during chemotherapy in both, and were considered to be induced by the anticancer drugs. Separate treatments with metoclopramide, chlorpromazine, and gabapentin did not have any effect, whereas immediate improvement was seen after taking pregabalin in both cases. <b>Conclusion</b>: Pregabalin, often used as an adjuvant analgesic, controls excessive neuronal excitement. In the present cases, effective relief of refractory hiccups was seen.