if i melt a dayquil liquid cap and mix it with a stary soda would it make lean

Mixing DayQuil or any medication with soda to create a substance like "lean" (a recreational drug typically made with prescription cough syrup that contains codeine and promethazine) can be dangerous and is not advisable. DayQuil does not contain these ingredients, and misuse of medications can lead to serious health risks, including overdose and harmful side effects. If you have questions about medications or are looking for safe ways to address health concerns, it’s best to consult with a healthcare professional. Always prioritize your health and safety.