What is the primary action needed if a patient experiences negative symptoms after using hydrogen peroxide solution?

When a patient experiences negative symptoms after using a hydrogen peroxide solution, the immediate and essential action to take is to flush the eyes with water immediately. This response is critical because hydrogen peroxide can be irritating to the eyes, potentially causing chemical burns or other damage if not addressed swiftly. Flushing the eyes helps to dilute the solution and remove any residues that could continue to cause irritation or harm.

Timeliness is vital in such situations; therefore, ensuring that the eyes are rinsed out as soon as possible can prevent more serious complications. This action prioritizes the patient's safety and well-being by addressing the immediate effects of exposure rather than waiting for symptoms to resolve on their own or switching products.