The study of investigators indicated that TMZ can up-regulate dopamine D2 receptor (DRD2) expression, and mediates Ferroptosis inhibition and chemoresistance of GBM. The clinical data also proved that the DRD2 expression in recurrent GBM is significantly higher than that in primary GBM. Moreover, the DRD2 antagonist haloperidol can attenuate the above function of DRD2, and increase the sensitivity of GBM to the TMZ by inducing fatal autophagy and ferroptosis. In xenograft mice, the combined usage of haloperidol and Temozolomide (TMZ) can significantly inhibit tumor growth and increase overall survival. The investigators' findings have been published in Clinical cancer research. Haloperidol known as a butylbenzene antipsychotic drug, has been widely used in several kinds of mental illnesses, such as depression, schizophrenia, and Bipolar disorder. And the safe dosage of the haloperidol is clear so far. So in this study, the investigators will recruit the patients who suffered from recurrent GBM, and evaluate the effectiveness of single TMZ chemotherapy or combined with haloperidol.

Inclusion Criteria:

• Adult patients
• Primary GBM underwent surgery and TMZ chemoradiotherapy, and MRI confirmed the tumor recurrence
• Without severe cardiac diseases

Exclusion Criteria:

• Child patients (<18 years)
• Recurrence tumors grow fast, which needs surgery removal
• H3K27M midline glioblastoma
• Suffered with severe cardiac diseases