BBL and ADHD medication (Concerta)

Hi I would be very grateful if you could please answer a question I have .. I am 42 days post liposuction and fat transfer to buttocks (BBL) I need to take methylphenidate hydrochloride (Concerta XL 18 mg , prolonged release tablet) before exams as I have ADD/ADHD . My exam is on 8th January ( 4 days before the exam and including the exam I will take 54 mg prolonged release) As I am post op with my BBL Iam just worried this medicine might affect my healing or blood vessel formation between the grafted fat .. I cannot find any information on google about bbl and this medication and I wondered if you could please answer this question:) thank you