Is Dihexa Banned in Sports? WADA, the S0 Class and What Tested Athletes Should Know

Dihexa is a small modified peptide derived from angiotensin IV, developed at Washington State University and described in rodent and cell work as acting on the hepatocyte growth factor and c-Met system. It is not an approved treatment for Alzheimer's disease, dementia or any memory disorder in any country, and it has not been through human trials for those conditions or anything else. The evidence is rodent behavioural studies and cell-culture work. The fuller picture is in Dihexa benefits and Dihexa side effects.

People looking at Dihexa are usually also looking at Semax, Selank and the cognitive blends. The live pages describe the 2026 List this way:

Dihexa is not in either blend. The pattern is that the blends are prohibited by name through one or more ingredients, and the single cognitive agents are unnamed rather than cleared. The comparison of Dihexa with Semax is in Dihexa vs Semax.

The NCAA

College athletes are governed by the NCAA's banned drug classes. The NCAA states that its list is not exhaustive and that any substance chemically or pharmacologically related to a banned class is also banned even if not named, with the school and student-athlete both accountable. Dihexa is not among the published examples the live pages cite. Ask your athletics health care provider before starting anything.

Workplace panels

A standard pre-employment or workplace drug panel does not look for Dihexa. Those panels screen for a short, fixed list of drugs of abuse set in regulation, and nobody manufactures an immunoassay for a compounded cognitive peptide. Military, law enforcement and regulated professions can run stricter policies, so read your own. The detail is in do peptides show up on a drug test.

Anti-doping runs on strict liability: the athlete is responsible for what is in their sample, whatever the intent or the prescription. Only a therapeutic use exemption granted in advance makes a prohibited substance permitted, and it requires a diagnosed condition supported by clinical evidence, no reasonable permitted alternative, and no enhancement beyond a return to normal health. For a compound with no human exposure data and no approved indication anywhere, that is about as hard a case as exists. Memory complaints also have treatable causes, among them thyroid disease, low B12, sleep apnoea, depression and medication side effects, that need to be looked for first.

Dihexa acetate was placed in Category 2 of the FDA's interim 503A list in 2023, the category for substances with identified safety concerns, where the stated concern was the complete absence of human exposure data. In the FDA's April 2026 revisions it was moved out of Category 2, and the category document updated 14 May 2026 does not list it in Category 1, 2 or 3. The FDA has announced a Pharmacy Compounding Advisory Committee meeting before the end of February 2027 to consider dihexa acetate for the 503A Bulks List. A committee vote is a recommendation; the FDA's determination comes afterwards. Dihexa is legal to prescribe and dispense with a valid prescription, and compounded medications are not FDA approved. None of that is a drug approval, so none of it changes the S0 question.

The anti-doping rules do not reach someone outside any testing pool. At Pepti, Dihexa is $219 a month, all-in, covering medication, physician review, refill management and shipping, with no membership fee. It is a 5 mL multi-dose vial at 1 mg/mL (5 mg per vial). The typical printed direction is 0.25 mL (25 units on a U-100 syringe) subcutaneously once daily Monday through Friday, which is 0.25 mg per dose and 20 doses, about four weeks, so refills run every 28 days, one vial per fill. Your physician sets your directions after reviewing your intake, and they are printed on the vial.

1. Complete a free online intake covering your history, medications, what you want help with and whether you are subject to drug testing.
2. A physician licensed in your state reviews it, usually within 24 hours.
3. If it is appropriate, a PCAB-accredited, FDA-registered US 503A compounding pharmacy prepares it to that prescription. Lot test results are at /quality/lab-results.
4. It ships refrigerated with ice packs, sterile syringes and alcohol prep pads, with directions printed on the vial.
5. Your physician stays reachable for questions and side effects.

Step by step: how to get Dihexa prescribed online. Bloodwork is not required for any Pepti treatment. If your physician wants labs for your care, they'll ask through your account.