Drugs can cure or cause disease. Medically, cancer caused by the use of drugs is called “pharmacogenic cancer”. The following is a brief introduction of several drugs that may cause cancer, in order to arouse people’s vigilance. 1. Antipyretic and analgesic drugs: such as finasteride, aminopyrine, compound aspirin, aminophenazone, painkillers, etc. These drugs can cause renal pelvis cancer and bladder cancer if taken for several years or even decades. The incidence rate of those who take such drugs for a long time is about 9.5%. 2, anti-tumor drugs: azathioprine can induce lymphoma, leukemia (blood cancer), cervical cancer, lip squamous epithelial cancer; cyclophosphamide can induce bladder cancer, lymphoma and acute leukemia; long-term use of methotrexate for psoriasis can induce kidney cancer and breast cancer. 3, anti-epileptic drugs: long-term high-dose use of phenobarbital can lead to malignant brain tumors, pregnant women who take phenytoin sodium for a long time, their newborns can suffer from neurofibroblastoma. 4.Testosterone drugs: long-term high doses of methyltestosterone, dehydrotestosterone, testosterone enanthate for the treatment of aplastic anemia and other diseases may cause hepatocellular carcinoma. 5.Ethylene estradiol: Women who apply this drug in the first 3 months of pregnancy or for a long time may develop adenocarcinoma of the germline in their baby girls; the incidence of endometrial cancer will increase significantly in menopausal and postmenopausal women who use this drug; adrenal cancer may occur in male patients who use 0.5mg of this drug daily for several years. 6.Chloramphenicol: including chloramphenicol tablets, injections and chloramphenicol eye drops. These drugs can lead to leukopenia, aplastic anemia and acute leukemia if used for a long time, and the latency period for blood cancer can be up to 7 years. 7.Lisdexamfetamine: Women who take lisdexamfetamine for a long time, especially postmenopausal women, are prone to breast cancer. In addition, oxytetracycline, chloroform, arsenic compounds, coal tar ointment and other drugs have different degrees of carcinogenic effects. In principle, these drugs with carcinogenic effects should be used sparingly and in large doses for a long period of time, and when larger doses must be used, the duration of medication should be shortened as much as possible.