Trimethylxanthine is the world's most popular psychoactive drug - for many caffeine is such a ubiquitous substance that calling it a drug seems like a misnomer. How could something so widely used that has so few regulations around it be a drug? But a drug is simply a chemical substance that affects our nervous system function and can result in changes to our perception, mood, cognition, and behavior. I feel like caffeine ticks the box pretty well on all those accounts.In today's episode, we'll be exploring how caffeine works - some of its benefits and negatives and then we'll be looking at what we know about how caffeine and ADHD mix.Support me on PatreonConnect with me on:TwitterTiktokor ask me a question on my Contact PageFind the show note at HackingYourADHD.com/caffeineThis Episode's Top TipsCaffeine is a psychoactive drug whose primary mechanism is binding to adenosine receptors in the brain. The buildup of adenosine in our system is what makes us sleepy, so by binding to these receptors caffeine is able to keep us awake.Caffeine has a host of benefits but having too much caffeine near bedtime can affect our slow-wave sleep and reduce our total amount of sleep.There is still a lot of research that needs to be done on the interaction between caffeine and ADHD but it is clear that many people with ADHD attempt to self-medicate with caffeine.