Want to lower my heartrate...any suggestions?

[howlongisthenight]

So swim took 50 mg Adderall at 12 pm today and also took 500mg caffine. It is now one in the morning and his heartrate is still over 100. He thinks it went down but then has come back up. (at least he thought he crushed those extended release beads.) Swim would like to get back to normal before he goes to sleep. Other then that swim has no symptoms. Swim is a fair newb when it comes to this...taken it 15+ times, but with small doses, slowly increasing. But yea,.....swim is an althlete and usually has low resting heartrate. Swim is on break from college and in his parents house. He has taken two percocet and had a little bit of alcohol, but these seemed to haven not worked. He has no benzos or anything. Are there any random things around the house that will act as depressants?