Yīshēng zài chǔfāngjiān shàng xiě le sān zhǒng yào.
The doctor wrote three medications on the prescription slip.
Tips
mistakes
处 here is chǔ (third tone, meaning 'handle/dispense'), not chù. 笺 is jiān ('note paper'). 处方 alone means 'prescription'; 处方笺 specifically refers to the physical slip.
