Interferon 2a generally refers to recombinant human interferon α2a suppository, and interferon 2b refers to recombinant human interferon α2b injection, and there are some differences in the dosage form, indications, and specifications of the two drugs. Recombinant human interferon α2a suppository is a suppository, and recombinant human interferon α2b injection is an injection, which belongs to two different dosage forms of drugs. Recombinant human interferon α2a suppository can be used to treat acute and chronic viral hepatitis, hairy cell leukemia, condyloma acuminatum, lymphoma, chronic granulocytic leukemia and so on. Recombinant human interferon α2b injection can be used for the treatment of cervical erosion, chronic cervicitis, vaginitis caused by vaginal viral infection, and can also be used to prevent cervical cancer. Meanwhile, the specifications of the above two drugs are also different, the specifications of recombinant human interferon alpha 2a suppository are 1ml:1 million international units, 1ml:3 million international units and 1ml:5 million international units. While the specification of recombinant human interferon alpha 2b injection is 500,000 IU per injection. Patients are advised to distinguish interferon 2a and 2b correctly under the guidance of doctors and follow the doctor’s instructions strictly for reasonable medication.