Aminooxyacetic acid provides transient protection against seizures induced by hyperbaric oxygen

In an attempt to demonstrate a protective effect against convulsions induced by hyperbaric oxygen (OHP), aminooxyacetic acid (AOAA at 2.5 mg/kg) was administered subcutaneously to 60 white leghorn cockerels (aged 21-28 days) at periods of 1-72 h before exposure to OHP. A transient protection was noted 1-8 h after administration of the AOAA. This took the form of a 51-67% increase in the latent period before OHP induced convulsions began. By 12 h after injection, the protective effect had disappeared. Thereafter a phase of increased susceptibility to hyperbaric oxygen commenced. This phase lasted for at least a further 60 h.