Finasteride and vitamin B2 can be taken together, but the two medications need to be separated by more than half an hour. Finasteride is a 5 alpha reductase inhibitor, which can be used to treat symptomatic benign prostatic hyperplasia, while vitamin B2 is a vitamin drug, which can be used to prevent and treat vitamin B2 deficiency, such as xerostomia, dry and cracked lips, tongue inflammation, scrotum inflammation, conjunctivitis, and seborrheic dermatitis. The two drugs are not contraindicated, so can be taken together, but in order to prevent the occurrence of adverse reactions, the two drugs need to be taken at an interval of more than half an hour, need to strictly comply with the doctor’s instructions for medication. Finasteride is well tolerated, and adverse reactions are mild and transient. However, it is not suitable for women and children and needs to be contraindicated for those who are allergic to any of the components of the product. Vitamin B2 must be taken in the recommended dosage and not in excess. It is contraindicated for those who are allergic to the product and should be used with caution by allergic individuals. It is recommended that the above medications need to be taken in strict compliance with medical advice.