 IDRA-21 may not produce neurotoxicity under normal conditions, although it may worsen neuronal damage following global ischemia after stroke or seizures.In comparison to the ampakines or benzoylpiperidine-derived AMPA receptor potentiators, IDRA-21 was more potent than CX-516, but less potent than CX-546.Newer benzothiadiazide derivatives with greatly increased potency compared to IDRA-21 have been developed, but these have not been researched to the same extent, with the benzoylpiperidine and benzoylpyrrolidine CX-series of drugs being favoured for clinical development, most likely due to more favourable toxicity profiles at high doses.