There are side effects of taking castor beans for a long time. Castor seed is toxic, long-term use may cause poisoning, so it is not recommended to blindly use the drug. Castor beans are the seeds of castor beans in the genus Castor, family Euphorbiaceae, sweet, pungent, flat, with diarrhea and stagnation, swelling and toxin removal effects. Castor seed can be used for stool dryness, carbuncle (is a kind of poisonous sores, occurring on the surface of the body, limbs, internal organs of the acute suppurative disease) swelling and poisoning, laryngeal paralysis (pharyngeal redness, swelling and pain, or dryness, foreign body sensation, or pharyngeal itching discomfort and swallowing difficulties), scrofula (mainly refers to the cervical lymph nodes tuberculosis). This drug is toxic, long-term internal or external use, may cause poisoning, serious cases can be life-threatening, external use may also lead to patients with anaphylactic shock, so patients are not recommended to use castor beans for a long time. Patients with loose stools and pregnant women are prohibited from using this drug. Patients who need to use this drug, should be under the guidance of a doctor, stop the drug in time to ensure the safety of their own medication.