Single-arm trial to evaluate the efficacy and safety of baclofen in treatment of intractable hiccup caused by malignant tumor chemotherapy.

Previous studies suggest that baclofen may be useful in the treatment of intractable hiccup caused by chemotherapy. This study was aimed to assess the possible efficacy and safety of baclofen. In total, 65 patients with intractable hiccup caused by chemotherapy were screened. 45 patients with intractable hiccup caused by chemotherapy were finally recruited. Participants in the trial received 10 mg baclofen three times daily for 3 days. The primary outcome measure was cessation of hiccups. Secondary outcome measures included efficacy and adverse events. All 45 patients completed the study. Among them, 41 cases were cured (91.11%, 41/45), 4 cases were relieved (8.89%, 4/45), and the overall effective rate was 100% (45/45). Furthermore, the median remission time was 2(1, 9) times, the median cure time was 2(1, 9) times, the remission rate of one-time was 13.33% (6/45), the remission rate of two-time was 53.33% (24/45), and 2 cases (4.44%, 2/45) relapsed after drug withdrawal. No serious adverse events were documented. Only 1 case (2.22%) had grade 2 fatigue and 2 cases (4.44%) had grade 1 sleepiness. Baclofen is safe and effective in the treatment of intractable hiccup caused by chemotherapy of malignant tumor.