I know that medications can be purchased anonymously. Tell me how this can be done? I'm interested in antidepressants.

It worries me that you want to buy obscure drugs on the black market. Why do you need antidepressants? Are you depressed? I would encourage you to find a hobby to take your mind off things. For example, you can become an artist https://theoriginalartshop.net . If your paintings are in demand, you will become rich and famous, depression will definitely go away.