If I took 36 mg of Concerta at 12 o'clock pm today can I safely take a 20 mg adderall XR at 430 pm?

It's generally not recommended to combine Concerta (methylphenidate) and Adderall XR (amphetamine) without consulting a healthcare professional. Both medications are stimulants and can increase the risk of side effects such as increased heart rate, anxiety, and hypertension. It's crucial to follow your doctor's guidance regarding medication timing and dosages to ensure safety and effectiveness. If you have concerns about your medications, please reach out to your healthcare provider.