Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Informational only. Not medical advice.INFORMATIONAL PLATFORM ONLY — NOT MEDICAL ADVICE, DIAGNOSIS, OR TREATMENT
Head-to-head comparison of ISRIB and Unifiram — mechanism, side effects, legal status, and pricing.
ISRIB is a non-peptide small-molecule eIF2B activator (bis-chlorophenoxyacetamide-cyclohexane class) that antagonizes the integrated stress response (ISR) by stabilizing the eIF2B guanine-nucleotide exchange factor complex. It is not an approved drug and has no completed human clinical trials or validated human safety or efficacy data. Chemically distinct eIF2B-activator analogs (DNL343, ABBV-CLS-7262) have reached human trials, but DNL343 missed primary endpoints in a Phase 2/3 ALS trial (January 2025). ISRIB is sold by reagent suppliers for research use only.
Unifiram (DM-232) is a synthetic non-peptide small-molecule nootropic structurally related to sunifiram, though not a racetam itself. It originated from Italian academic research (University of Florence) in the early 2000s and has never progressed beyond preclinical animal studies; it is not an approved or investigational drug in any regulatory database. Unifiram is sold openly by research-chemical vendors as an unregulated laboratory reagent. No human data of any kind exist.
ISRIB
Unifiram
Category
Legal Status
Mechanism
Side Effects
COA-verified vendors · trust score ≥70 required · single-vial price — bulk/bundle deals may be lower
ISRIB
Unifiram
COA corpus from Disclosed Labs — independently tested batches only.
ISRIB
1
COAs
99.8%
Avg purity
1
Labs
Unifiram
1
COAs
99.4%
Avg purity
1
Labs
No completed or published human clinical trials of ISRIB itself exist; it has no validated human pharmacokinetic, safety, or efficacy data. In mice, systemic ISRIB enhanced spatial and fear-associated long-term memory in healthy animals, reversed hippocampus-dependent spatial-learning and working-memory deficits weeks after traumatic brain injury, and reset elevated ISR activity in aged (18–24 month) mice, reversing age-related spatial-memory decline with a brief 3-day dosing course. In prion-disease transgenic mice, ISRIB partially restored protein synthesis and prevented neurodegeneration without the pancreatic exocrine toxicity seen with PERK-inhibitor approaches. In vitro and in a patient-derived xenograft mouse model, ISRIB combined with imatinib attenuated RAS/RAF/MAPK and STAT5 signaling and eliminated therapy-resistant chronic myeloid leukemia cells.
Key references
No human data of any kind exist for unifiram; no registered clinical trials or published human studies were found. All available evidence is from rodent behavioral and in-vitro electrophysiology studies. In mice and rats, unifiram (0.001–1 mg/kg i.p. or 0.01–0.1 mg/kg oral) reversed amnesia induced by scopolamine, mecamylamine, baclofen, clonidine, and NBQX in passive-avoidance and Morris water-maze tests, at doses roughly 1,000-fold lower than piracetam, without impairing motor coordination or altering spontaneous locomotor activity. No systematic toxicology (repeat-dose, genotoxicity, carcinogenicity) studies have been published.
ISRIB and Unifiram are both in the Cognitive category and may have overlapping mechanisms. Researchers should review both profiles carefully, understand the mechanisms of action, and monitor the relevant biomarkers when combining compounds in the same class. As always, consult a licensed healthcare provider before making any decisions about combining research compounds.
This platform provides informational tools only, not medical advice. This comparison is for educational purposes only. Consult a licensed provider.
Contraindications
Lab Testing
Disclosed Labs