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Amphetamines (Adderall/Vyvanse)

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What amphetamines are

Amphetamines are a group of medications sold under brand names such as Adderall, Adderall XR, Vyvanse (lisdexamfetamine), Dexedrine, and Mydayis, along with their generic versions. They work mainly by boosting the activity of two of the brain’s chemical messengers, dopamine and norepinephrine, which help with focus, attention, and alertness. Because they rev up that signaling, they are often called stimulants. They come in several forms, including tablets, capsules, and longer-acting versions that release over the day. They are controlled medicines, so they are used thoughtfully and with regular follow-up.

What it treats

Your clinician might suggest an amphetamine for one of these, among other possible off-label uses:

Whether it is a good fit depends on several factors, including your heart health, your history, and your other medications. As with everything in psychiatry, that is decided case by case.

How it works

Honestly, no one knows with complete certainty how amphetamines produce their benefit. What robust research supports is that they increase the activity of dopamine and norepinephrine in the brain, which can make it easier to focus, sustain attention, and stay alert. The biology is only part of the picture: how much a medication helps, and how it feels, is individual. Two people on the same medication can have very different experiences.

How to take it

There is no single right way to take an amphetamine; it depends on you and your clinician, and a medicine in this group calls for more care than most. The plan you and your clinician make together is the one to follow, not a number you read online. A few points matter here:

  • Take it exactly as you and your clinician agreed, and do not increase the amount on your own.
  • Expect regular check-ins on things like blood pressure, heart rate, sleep, appetite, and mood, especially early on.
  • Store it securely and do not share it. These medicines are controlled, and giving them away or selling them can harm others and is against the law.
  • If you miss a dose, ask your clinician or pharmacist what to do rather than doubling up.
  • Do not stop abruptly after taking it regularly. Stopping suddenly can leave you drained, low, or very tired for a stretch, and your clinician can step it down more gently when the time comes.

A word on dependence, plainly: amphetamines are Schedule II medicines, the category with a high potential for misuse and dependence. With steady use the body and brain can come to rely on them, so misusing them or stopping suddenly can feel bad. Taken as prescribed and monitored, many people use them safely for years. Being thoughtful about this is not a judgment of you; it is exactly why we plan the dose together, follow up regularly, and store the medicine safely.

What to expect

This varies from person to person. Unlike some medications that take weeks to help, an amphetamine often has a noticeable effect the same day, which is part of how it is used. Any side effects, if they happen, also tend to show up early, and many ease over the first weeks or can be eased by adjusting the timing. The right plan for you may change over time, and that is something you and your clinician revisit together. If it does not turn out to be the right fit, that is useful information, not a dead end, and there are other options. As always, this is case by case.

Side effects

Not everyone gets side effects, and many that do happen ease over the first weeks. The lists below are possibilities, not certainties.

Possible more common side effects:

  • Reduced appetite, and in children some slowing of growth, which your clinician monitors
  • Trouble sleeping
  • Headache, dry mouth, or an upset stomach
  • Feeling jittery, anxious, or irritable
  • A faster heartbeat
  • A let-down or low feeling as a dose wears off

If any of these stick around or bother you, send a non-urgent message through the patient portal or bring it up at your next visit; often a small change in timing or plan helps.

Less common, but concerning side effects that could require emergency care:

  • Chest pain, shortness of breath, or fainting
  • Signs of a serious change in thinking: hearing or seeing things that others do not, severe agitation, or feeling abnormally high, wired, or irritable with racing thoughts and far less need for sleep than usual
  • Serotonin syndrome: agitation, confusion, a racing heart, fever, heavy sweating, or stiff or twitching muscles, especially after another medication is added
  • Fingers or toes that feel numb, cool, or painful, or that change color from pale to blue to red
  • A painful erection, or one lasting more than a few hours
  • A seizure
  • Signs of an allergic reaction: rash, hives, or swelling of the face, lips, or throat
  • Any new or worsening thoughts of harming yourself

For any of these, use the help options at the top of this page: call 911 or go to the nearest emergency department for a medical emergency or severe reaction, or call or text 988 for a mental health crisis.

When to reach out, and where

For routine questions, side effects that can wait, or how things are going, send your clinician a message through the patient portal. These are part of your ongoing care and are answered in the normal course of a few business days, so they are best for things that are not urgent.

If something feels urgent, you do not need to wait for a reply. The help options at the top of this page are the fastest way to get care: 911 or the nearest emergency department for a medical emergency or severe reaction, or 988 any time for a mental health crisis or thoughts of self-harm.

Questions to ask your clinician

  • What are you hoping this medication will help with in my case?
  • How and when will we know if it is working?
  • What should we watch for given my heart health and history?
  • What should I do about appetite, sleep, or mood changes if they come up?
  • What is the plan if this one turns out not to be the right fit?
  • How will we handle stopping it, if and when we get there?
FAQ

Common questions about Amphetamines (Adderall/Vyvanse)

The goal is to help you focus and feel more like yourself, not to make you feel keyed up, flat, or not yourself. When the fit and the amount are right, many people simply notice it is easier to settle into a task. If you feel jittery, irritable, or unlike yourself, tell your clinician, because that usually means something can be adjusted.

Reduced appetite and trouble sleeping are among the more common effects, especially early on, and they often ease or can be managed by adjusting the timing or the plan. For a child, growth is something your clinician keeps an eye on over time. Mention these at your visits so we can keep them from getting in the way.

I start with a full evaluation, including your heart history, and a conversation about what you are hoping to change, then we decide together. With a medicine in this group I am especially thoughtful: I aim for the lowest tolerable dose that clearly helps, we keep an eye on sleep, appetite, mood, and blood pressure, and we stay in close touch. As with everything in psychiatry, the plan is built case by case.

Related
References

This page is educational. It is not medical advice, and reading it does not create a clinician-patient relationship with Cognia Health. Everyone responds to medication differently; what helps one person may not help another. Never start, stop, or change a medication without talking with your clinician. If you think you are having a serious medication reaction or a mental health emergency, call 911, or call or text 988. More options: emergency resources .