Inclusion Criteria:
* 1\. Glioblastoma
* 2\. Newly diagnosed with no prior surgery, radiation, chemotherapy, or other tumor-treating agent
* 3\. Age ≥18 years
* 4\. KPS \> 70
* 5\. Adequate organ and marrow function as defined below:
* \- Bilirubin ≤1.5 times upper limit of normal
* \- AST and ALT ≤ 3 times ULN
* \- Creatinine ≤ 1.5 x ULN and/or GFR ≤ 60 mL/min
* -ANC ≥ 1000 cells/ul
* \- Platelet ≥ 100,000/ul
* \- Hemoglobin ≥ 9 g/dl
* 6\. All men, as well as women of child-bearing potential must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation, and for 7 days following completion of therapy. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately.
* 6a. A female of child-bearing potential is any woman (regardless of sexual orientation, marital status, having undergone a tubal ligation, or remaining celibate by choice) who meets the following criteria:
* \- Has not undergone a hysterectomy or bilateral oophorectomy; or
* \- Has not been naturally postmenopausal for at least 12 consecutive months (i.e., has had menses at any time in the preceding 12 consecutive months).
* 7\. Ability to understand and the willingness to sign a written informed consent.
Exclusion Criteria:
* 1.Chemotherapy, radiotherapy, or other cancer therapy within 4 weeks prior to starting study treatment.
* 2\. Subjects must have recovered from prior treatment-related toxicities to grade 2 or baseline (excluding alopecia and clinically stable toxicities requiring ongoing medical management, such as hypothyroidism from prior immune checkpoint inhibitor treatment).
* 3\. Subjects may not be receiving any other investigational agents for the treatment of the cancer under study.
* 4\. Brain metastases
* 5\. History of allergic or hypersensitivity reactions attributed to compounds of similar chemical or biologic composition to Acetadote.
* 6\. Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that, in the opinion of the investigator, would limit compliance with study requirements.
* 7\. Subjects must not be pregnant or nursing due to the potential for congenital abnormalities and the potential of this regimen to harm nursing infants.
