Jaw clenching is one of the most common side effects of Adderall and other stimulant medications. It happens because amphetamines increase activity in the brain pathways that control muscle tension, particularly in the jaw. The good news: there are several practical ways to reduce or stop it, ranging from simple habit changes to medical interventions.
Why Adderall Makes You Clench Your Jaw
Adderall works by boosting dopamine and norepinephrine in the brain. These same chemicals play a role in muscle activation, and the jaw muscles (especially the masseter, one of the strongest muscles in your body) are particularly sensitive to this kind of overstimulation. The result is involuntary clenching during the day, grinding at night, or both.
Higher doses tend to make it worse. In clinical case reports published in the Journal of Oral Rehabilitation, patients on higher doses of stimulant medications developed bruxism (the clinical term for clenching and grinding) that resolved completely when the medication was stopped or the dose was lowered. In one case, bruxism appeared during the fourth week of treatment at a higher dose, disappeared when the medication was discontinued, then returned when it was restarted. Notably, it eventually resolved on its own within two weeks at the lower dose, suggesting your body can sometimes adapt.
Immediate Relief: Jaw Exercises and Self-Massage
When you catch yourself clenching, these techniques can release tension in the moment and, practiced regularly, help retrain your jaw to stay relaxed.
Tongue-to-roof relaxation: Touch your tongue to the roof of your mouth, just behind your upper front teeth. Slowly open and close your mouth several times. This position naturally prevents the jaw from clenching and helps reset the muscles. It’s subtle enough to do at your desk or in a meeting.
Masseter self-massage: Place two or three fingers on your cheek, about halfway between your mouth and ear, just below the cheekbone. That’s your masseter muscle. Apply firm pressure and move your fingers in slow circles, kneading from top to bottom and back again. Even 60 seconds of this can noticeably reduce tightness.
Chin tucks: Stand with your back against a wall and pull your chin straight back toward the wall, creating a “double chin.” Hold for three to five seconds and repeat several times. This stretches the muscles along the back of the jaw and neck that contribute to clenching.
Resistance training: Place your thumb under your chin. Open your mouth slowly while pressing upward with your thumb, creating gentle resistance. Hold for three to five seconds, then close. This fatigues the clenching muscles in a controlled way, making involuntary clenching less likely afterward.
Build Awareness Throughout the Day
Most people don’t realize they’re clenching until the soreness hits later. Setting a timer on your phone every 30 to 60 minutes to check your jaw position can be surprisingly effective. When the reminder goes off, ask yourself: are my teeth touching? They shouldn’t be. At rest, your lips should be closed but your teeth slightly apart, with your tongue resting gently on the roof of your mouth. That’s the position you’re trying to return to throughout the day.
Over a few weeks, these check-ins build an automatic habit. You’ll start catching the clench earlier and releasing it without the reminder.
Skip the Gum
Chewing gum feels like it gives your jaw something productive to do, but research suggests it’s counterproductive. A study measuring jaw muscle activity found that just 10 minutes of gum chewing increased masseter muscle activity by over 1,600% on the chewing side compared to resting. That level of exertion can sensitize the pain receptors in your jaw muscles, making subsequent clenching more painful and potentially worsening the cycle. If you’re already dealing with stimulant-induced tension, gum adds fuel to the fire.
Magnesium and Hydration
Magnesium plays a central role in muscle relaxation. When levels are low, muscles are more prone to cramping and sustained contraction. Stimulants can also be mildly dehydrating, and dehydration further contributes to muscle tension.
The recommended daily magnesium intake is 410 to 420 mg for adult men and 320 to 360 mg for adult women. Many people fall short of this through diet alone. Magnesium glycinate is a popular supplemental form because it’s well absorbed and less likely to cause digestive issues than other types like magnesium oxide. Foods rich in magnesium include pumpkin seeds, almonds, spinach, and dark chocolate.
Staying well-hydrated matters too. Adderall suppresses thirst for many people, so you may need to drink water intentionally rather than waiting until you feel thirsty. Keeping a water bottle visible at your workspace serves as a passive reminder.
Mouth Guards for Nighttime Grinding
If you’re grinding your teeth in your sleep, a mouth guard protects against enamel wear, chipped teeth, and the jaw joint damage that comes with chronic grinding. Custom-fitted guards from a dentist offer the best protection and comfort. Store-bought options are cheaper but less effective and can feel bulky enough to disrupt sleep.
Mouth guards don’t stop the clenching itself. They act as a barrier, distributing the force so your teeth and jaw joint take less damage. If you wake up with a sore jaw, headaches near your temples, or your partner hears you grinding at night, a guard is worth getting sooner rather than later. Chronic grinding can lead to temporomandibular joint (TMJ) problems: pain around the jaw joint, clicking or popping when you open your mouth, limited range of motion, and persistent headaches.
Talk to Your Prescriber About Dose and Timing
Because jaw clenching is dose-dependent, a lower dose or a switch to an extended-release formulation can sometimes reduce the intensity. Extended-release versions deliver a steadier, lower peak of medication throughout the day, which may produce less muscle overstimulation than the sharp peaks of immediate-release tablets.
Clinical evidence shows that dosage reduction alone can resolve stimulant-induced bruxism in many cases. This doesn’t mean you need to sacrifice symptom control for your ADHD. Sometimes a small dose reduction, even 5 mg, is enough to take the edge off the clenching while still managing attention effectively. Your prescriber can also evaluate whether the clenching appeared after a recent dose increase, which is a strong signal that the higher dose is the culprit.
Botox for Severe Cases
When other approaches haven’t worked and clenching is causing significant pain or dental damage, injections into the masseter muscle are an option. A randomized controlled trial found that a single treatment significantly reduced both muscle activity and pain compared to placebo. The effects lasted roughly three to three and a half months before symptoms gradually returned, meaning repeat treatments are necessary.
Side effects in the study were minimal: some patients had mild pain or discomfort at the injection site during the first week, and nothing more serious was reported. The treatment works by partially weakening the masseter muscle so it physically can’t clench as hard. It’s typically reserved for people with persistent, painful bruxism that hasn’t responded to other strategies, and it’s not always covered by insurance when used for this purpose.
Putting It All Together
The most effective approach combines several strategies. Start with the low-effort changes: jaw awareness check-ins, the tongue-to-roof resting position, staying hydrated, and adding magnesium if your intake is low. Layer in self-massage and jaw exercises when tension builds. If you’re grinding at night, get a mouth guard to protect your teeth while you work on the underlying cause. And if the clenching is persistent or worsening, bring it up with your prescriber. A dose adjustment is often the single most effective fix, and it’s one many people delay longer than they need to.