Adderall Side Effects: What Is Common and What Is Not
The common Adderall side effects from the FDA label, the rare but serious ones, what the boxed warning says, and which symptoms mean calling your prescriber.
How to track Adderall side effects before your follow-up5 steps
- Write down your dose time Note the exact time you take each dose every day for two weeks, including days you skip or take it late.
- Log appetite and meals Write what you actually ate and when, especially at lunch, when the effect is usually strongest.
- Track sleep Record when you got into bed, roughly when you fell asleep and how rested you felt in the morning.
- Note body and mood signals Write down headaches, a racing heart, irritability, low mood or anxiety, with the time of day they showed up.
- Bring the log to your appointment Share the notes with your prescriber so dose, timing or form can be adjusted on real data instead of memory.
Most people search "Adderall side effects" at one of two moments: right before the first dose, or a week in, lying awake at 2 a.m. wondering whether this is normal.
I want to say clearly where this article comes from. I live in Turkey, where Adderall is not sold, and I have never taken it. I have been on ADHD medication myself, but not this one. So this is not a personal review. It is a research-based explainer built from the FDA prescribing information, the patient Medication Guide and peer-reviewed studies, all checked on October 23, 2026.
If you want the basics first, start with what Adderall is and how it works. This page is only about side effects: which ones are common, which ones are rare but serious, and which ones mean picking up the phone.
What Adderall is, in one paragraph
Adderall is a mix of amphetamine salts, a central nervous system stimulant approved in the US for ADHD. It comes as an immediate-release tablet and as Adderall XR, an extended-release capsule. Under federal law it is a Schedule II controlled substance, as its label states. Most side effects come from the same thing that makes it work: it raises activity in brain systems that also affect appetite, sleep, heart rate and alertness.
The common side effects, with real numbers
The clearest adult numbers come from the Adderall XR label. In a 4-week clinical trial with 255 adults, people taking Adderall XR (doses up to 60 mg) were compared with people taking a placebo. These were the side effects reported by at least 5% of the Adderall group and more often than with placebo:
| Side effect | Adderall XR | Placebo |
|---|---|---|
| Dry mouth | 35% | 5% |
| Loss of appetite | 33% | 3% |
| Insomnia | 27% | 13% |
| Headache | 26% | 13% |
| Weight loss | 10% | 0% |
| Nausea | 8% | 3% |
| Anxiety | 8% | 5% |
| Agitation | 8% | 5% |
| Dizziness | 7% | 0% |
| Fast heart rate | 6% | 3% |
| Diarrhea | 6% | 0% |
| Weakness | 6% | 5% |
| Urinary tract infection | 5% | 0% |
A few things stand out. Dry mouth and appetite loss are the big two, each affecting about a third of people. Insomnia and headache also happen with placebo, but about twice as often with the drug.
The label also lists effects seen in 2 to 4% of adults: teeth clenching, lower sex drive, erectile problems, palpitations, sweating, painful periods, constipation and emotional ups and downs.
In children 6 to 12, the most common were loss of appetite, insomnia, stomach pain, emotional lability, vomiting, nervousness, nausea and fever. In teens 13 to 17, they were loss of appetite, insomnia, stomach pain, weight loss and nervousness.
Appetite and weight
Appetite loss is usually strongest during the hours the medication is working. Many people notice they simply forget lunch. Over weeks, that can turn into weight loss, which is why weight is checked at follow-up visits.
For children, the label asks prescribers to closely monitor height and weight, because stimulants have been linked to weight loss and slower growth. In 2025 the FDA added that Adderall XR is not recommended under age 6, because younger children had higher blood levels and more side effects, including weight loss, at the same dose.
If eating is the problem, practical fixes exist, and timing matters more than willpower. I wrote about this in detail in what to do when ADHD medication kills your appetite.
Sleep
Insomnia was the single most common reason adults in the trial stopped the medication. Overall, 12% of adults on Adderall XR quit the study because of side effects, compared with 1.6% on placebo, and trouble sleeping led that list.
This is often a timing issue. MedlinePlus advises against taking it in the late afternoon or evening, and the XR form is usually taken right after waking. If your sleep has shifted, your prescriber may look at the time of the dose, the form or the amount. The broader picture is in does ADHD medication disturb sleep.
Heart and blood pressure
According to the FDA label, stimulants raise blood pressure by an average of about 2 to 4 mmHg and heart rate by about 3 to 6 beats per minute. For most people that is small. The immediate-release label adds that some people have larger increases, which is why blood pressure and pulse are checked during treatment.
The serious end is rare. Sudden death has been reported in people with structural heart problems or other serious heart disease taking stimulants at normal doses. That is why the label tells prescribers to avoid Adderall in people with known serious heart disease and to ask about family history of sudden death or arrhythmia before starting.
Long-term data is still developing. A large Swedish registry study (Zhang et al., 2024) of people with ADHD found that each additional year of ADHD medication use was linked to a 4% higher risk of cardiovascular disease, mostly hypertension and arterial disease. It covered all ADHD medications, not just Adderall, and it shows an association, not proof of cause. The authors called for weighing benefits against risks and for regular cardiovascular monitoring throughout treatment. More on this in does ADHD medication affect the heart.
Mood, anxiety and the mind
Anxiety and agitation show up in the common list. After approval, reports also included restlessness, irritability, low mood, aggression, tics and skin picking.
Rarer but more serious is new psychosis or mania: hearing voices, believing things that are not true or an unusually elevated mood. In pooled short-term trials of stimulants, this happened in about 0.1% of people on a stimulant and 0% on placebo. Before prescribing, the label asks clinicians to screen for bipolar risk, including family history.
Dose may matter here. A Boston hospital study (Moran et al., 2024) found that prescription amphetamine use in the past month was linked to higher odds of a first episode of psychosis or mania, and the odds were highest at doses above 30 mg of dextroamphetamine equivalents. Methylphenidate was not linked to higher odds in the same study. The authors note selection bias in their design, so this is a signal for careful monitoring, not a final answer.
The rare but serious list
The label's Warnings and Precautions section includes a few more items that are uncommon but worth knowing by name:
- Seizures. Stimulants may lower the seizure threshold.
- Circulation problems in fingers and toes. This includes Raynaud's phenomenon: fingers or toes that feel numb, cold or painful, or turn pale, then blue, then red.
- Serotonin syndrome. The risk is higher when Adderall is combined with medicines like SSRIs, SNRIs or triptans. Signs include agitation, fever, sweating, confusion, a fast heartbeat, muscle stiffness and stomach upset.
- Tics and Tourette syndrome. New tics or worsening tics can appear.
- Vision changes. Blurred vision and enlarged pupils have been reported.
- Allergic and skin reactions. Rarely, these include serious rashes and swelling of the face or throat.
This is why your prescriber needs your full medication list, including antidepressants and migraine medicines. Do not stop another medicine on your own because of this list either. Ask first.
The boxed warning: misuse, abuse and addiction
A boxed warning is the FDA's most prominent safety warning. For Adderall it says the drug has a high potential for abuse and misuse, which can lead to a substance use disorder, including addiction, and that misuse can cause overdose and death. The risk climbs with higher doses or with snorting or injecting.
In May 2023, the FDA required this warning to read the same way across all prescription stimulants for ADHD. The agency noted that most people who misuse stimulants get them from family or friends. Its advice to patients is simple: never share your medicine, store it securely and dispose of leftovers properly.
For someone taking Adderall as prescribed, this does not mean addiction is the expected outcome. It means your prescriber should check in on it over time. I looked at the evidence on this question in is ADHD medication addictive.
Stopping and the "crash"
The label notes that stopping suddenly after long use can bring withdrawal symptoms: low mood, fatigue, vivid unpleasant dreams, sleeping too little or too much, increased appetite and feeling slowed down or agitated. MedlinePlus says your doctor will usually lower the dose gradually rather than stop it all at once.
Some people also describe a dip in mood or energy as each day's dose wears off. If that happens to you, note the time it starts. That detail helps your prescriber decide whether the form or timing should change.
Common or serious: a quick guide
| Usually common and adjustable | Rare and needs prompt attention |
|---|---|
| Dry mouth | Chest pain or fainting |
| Reduced appetite, mild weight loss | Hallucinations, paranoia, mania |
| Trouble falling asleep | Seizure |
| Headache in the first weeks | Numb, discolored or sore fingers or toes |
| Mild jitteriness or nervousness | Fever, sweating, confusion and muscle stiffness |
| Nausea, stomach upset | Weakness on one side, slurred speech |
| Slightly faster pulse | Swelling of the face or throat, severe rash |
When to call your doctor
Call your prescriber about any side effect that is severe, does not fade or keeps getting worse, and go to the emergency room or call 911 for anything in the right-hand column above. Dose, form and timing are decisions that belong with the person who prescribes your medication, and most common side effects are exactly what those adjustments are for.
If side effects keep outweighing the benefit, there are other routes. Stimulants differ from one another, as I lay out in Vyvanse vs Adderall, and some people do better on non-stimulant ADHD medications. For a general framework of which side effects pass and which need adjusting, see my broader guide to ADHD medication side effects.
What I take from all this
A list of side effects reads like a list of threats. It is not. It is a list of things to watch for and talk about, and most of the top of that list is adjustable.
The label gives you the numbers. Your notes from the past two weeks give your prescriber the rest.
Frequently asked questions
- What are the most common side effects of Adderall?
- In the adult clinical trial on the Adderall XR label, the most common were dry mouth, loss of appetite, insomnia, headache, weight loss, nausea, anxiety, agitation, dizziness, a fast heart rate, diarrhea, weakness and urinary tract infections. Children most often had loss of appetite, insomnia and stomach pain.
- Do Adderall side effects go away?
- Some, like headache or mild jitteriness, often ease after the first weeks. Others, like poor appetite or trouble falling asleep, tend to depend on dose and timing and may improve when your prescriber adjusts them. A side effect that is getting worse instead of better is worth reporting.
- Can Adderall cause anxiety or mood changes?
- Yes. Anxiety and agitation are listed among common adult side effects, and irritability, low mood and emotional ups and downs are also reported. Rarely, stimulants can cause new psychotic or manic symptoms, which need prompt medical attention.
- Is Adderall bad for your heart?
- On average, stimulants raise blood pressure by about 2 to 4 mmHg and heart rate by about 3 to 6 beats per minute, according to the FDA label. Serious heart events are rare but are the reason prescribers ask about heart disease and family history before starting, and check blood pressure and pulse during treatment.
- What does the Adderall boxed warning say?
- It says Adderall has a high potential for abuse and misuse, which can lead to a substance use disorder, including addiction, and that misuse can result in overdose and death. Since a 2023 FDA update, the same warning appears on all prescription stimulants for ADHD.
- When should I call a doctor about Adderall side effects?
- Call your prescriber about side effects that are severe, persistent or getting worse. Get emergency care for chest pain, fainting, a seizure, signs of a stroke, hallucinations or symptoms of serotonin syndrome such as agitation with fever, sweating and muscle stiffness.