Stop using any more substances
Drink water
Wash your face with cool water
Rest in a quiet place
Take slow, steady breaths
Avoid bright lights and loud noise
Sit or lie down safely
Eat a light snack if you can
Chew gum or brush your teeth
Use eye drops if your eyes are red
Wear sunglasses only if appropriate
Keep your posture relaxed and steady
Speak slowly and less than usual
Avoid driving or operating anything dangerous
Stay with a trusted sober person
Wait it out until it passes
Seek urgent medical help if you have chest pain, trouble breathing, severe confusion, fainting, or cannot stay awake