These symptoms can include burning, irritation, and itching at the site of exposure or intake. Following these initial symptoms, convulsions follow and can be fatal. Low dose, long-term exposure can lead to damage in the central nervous system, resulting in muscle stiffness, restlessness, and sensitivity to light and noise.[4] Although crimidine is fast acting, it is also quickly secreted and can pass through the system in less than 24 hours..