Toxic. According to the public health network, flea drugs can be divided into powder and liquid medicine, and a large number of chemical components and toxic substances are usually added in the preparation process of drugs. Spraying flea medicine on the bed may cause the medicine to remain in the bed, which will easily enter the body after long-term contact, causing dry throat, cough, poor breathing and other hazards, and it is also easy to irritate the skin, causing discomfort symptoms such as redness and local itching. So flea medicine is poisonous when sprayed on the bed. After using flea medicine, it is necessary to clean bedding and sheets in time to remove the drug components on the surface. If you have other obvious discomfort symptoms, you should go to the hospital in time and cooperate with the doctor for active treatment.