On January 13, 2026 Pasithea Therapeutics Corp. (NASDAQ: KTTA) ("Pasithea" or the "Company"), a clinical-stage biotechnology company developing PAS-004, a next-generation oral macrocyclic MEK inhibitor for the treatment of neurofibromatosis type 1 associated plexiform neurofibromas (NF1-PN), reported updated timelines on its ongoing clinical trials in advanced cancer and adult NF1-PN patients.

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Ongoing Phase 1/1b clinical trial in adult patients with NF1-PN (NCT06961565):

Pasithea has completed enrollment of 12 patients through the first 4 dose cohorts (4, 8, 12 and 18 mg tablets) in Part A of the study.

The Company plans to present data in the second half of 2026, including available efficacy data through the six-month timepoint for both plexiform and cutaneous neurofibromas. The planned data release is also expected to include safety, tolerability and pharmacokinetic (PK) data.
Ongoing Phase 1 clinical trial in advanced cancer patients (NCT06299839):

Pasithea expects to present longer-term follow-up data from patients in Cohort 4 (15mg capsule) through Cohort 8 (45mg capsule) in the second quarter of 2026.
"2025 was a pivotal year for Pasithea, highlighted by early evidence of a differentiated safety and tolerability profile and initial signals of clinical activity in our first-in-human dose escalation advanced cancer study of PAS-004, our potentially best-in-class macrocyclic MEK inhibitor," said Dr. Tiago Reis Marques, Chief Executive Officer of Pasithea. "In November 2025, we announced encouraging results in patients previously treated with a MEK inhibitor, including a partial response and an initial disease control rate of 71.4% among efficacy evaluable patients with BRAF-mutated tumors and met our planned milestone of providing initial NF1-relevant data through the presentation of pharmacokinetic results in the first two cohorts of our NF1 study. We believe these findings from our advanced cancer study support the development of PAS-004 for the treatment of NF1-PN patients. Additionally, in December 2025, we successfully raised $60 million in gross proceeds through a public offering, enabling us to advance PAS-004 through several key milestones and support operations through at least the first half of 2028. We remain steadfast in our mission to deliver safe, tolerable and effective therapies to patients with significant unmet need, especially in indications requiring chronic dosing."

(Press release, Pasithea Therapeutics, JAN 13, 2026, View Source [SID1234662018])