It's important to note that "lean" is a slang term for a recreational drug made from a combination of cough syrup containing codeine, soda, and candy. It is a highly dangerous and illegal substance, and it is not advisable to buy or use it.
If you are looking for a legal and safe way to purchase cough syrup, you can buy it at a local pharmacy with a prescription from a doctor. However, you should only use it as directed by your doctor and not for recreational purposes.
If you or someone you know is struggling with substance abuse or addiction, it's important to seek help from a professional. There are many resources available, including hotlines, support groups, and treatment programs, that can help you or your loved one overcome addiction and lead a healthier life.