Given the task definition and input, reply with output. In this task, you will be given sentences in which your task is to recognize the name of the drug or medicine. Drugs are substances that change a person's mental or physical state. They can affect how your brain works, how you feel and behave, your understanding, and your senses. Although there might be several correct answers, you need to write one of them.

These findings suggest that the corneal and retinal changes are the result of a toxic effect of tamoxifen when used in the doses and duration described.

tamoxifen