They include dizziness, headache, seizures, short-term memory loss, respiratory failure and coma. CFP produces gastrointestinal, neurological and cardiovascular symptoms. The same symptoms as ASP are seen in CFP and also sweating, numbness, and reversal of temperature sensation. These can all lead to paralysis and death. Gastrointestinal symptoms occur within 30 minutes of consumption and include incapacitating diarrhea, nausea, and chills.
Symptoms are purely neurological and include ataxia, giddiness, fever, rash and staggering.
In severe cases respiratory arrest occurs within 24 hours of consumption. There is no antidote for most if not all of these syndromes. Supportive therapy is usually the action taken and some of the toxins just have to run their course in 3-4 days with or without medical treatment. Many economies are damaged by the loss of coastal fisheries and shellfish beds. For fisheries, insurance rates rise, unemployment and bankruptcies rise and retail sales decline due to scares and public resources are diverted to monitoring programs.