Mydayis (mixed amphetamine salts) is a prescription drug used to treat attention deficit hyperactivity disorder (ADHD). The drug comes as a capsule that’s usually taken once per day in the morning.

Mydayis is taken to treat ADHD in adults and some children.

The active ingredient in Mydayis is mixed amphetamine salts. (An active ingredient is what makes a drug work.) Mydayis belongs to a group of drugs called stimulants.

This article describes the dosages of Mydayis, as well as its strengths and how to take it. To learn more about Mydayis, see this in-depth article.

Read about the typical Mydayis dosages below.

Note: This brief dosing chart highlights the basics of Mydayis dosages. Be sure to read on for more detail about adult dosages and children’s dosages. The capsules come in milligrams (mg).

FormStrengthsStarting dosage
capsule• 12.5 mg
• 25 mg
• 37.5 mg
• 50 mg
12.5 mg

What is the form of Mydayis?

Mydayis comes as an extended-release capsule. “Extended release” means that once you take a dose, the drug releases into your body slowly over time. This allows Mydayis to be taken only once per day.

What strengths does Mydayis come in?

Mydayis comes in the following strengths:

  • 12.5 milligrams (mg)
  • 25 mg
  • 37.5 mg
  • 50 mg

What are the usual dosages of Mydayis?

Mydayis is prescribed to treat attention deficit hyperactivity disorder (ADHD) in adults.

Your doctor will likely start you on a low dosage and adjust it over time to reach the right amount for you. They’ll ultimately prescribe the smallest dosage that provides the desired effect.

Your typical starting dosage will be 12.5 mg once per day. Your doctor might increase your dosage if needed. If so, they’ll typically add 12.5 mg each week until the dosage provides the desired effect. The maximum dosage for adults is 50 mg once per day.

Be sure to take the dosage your doctor prescribes for you. They’ll determine the best dosage to fit your needs.

What’s the dosage of Mydayis for children?

Mydayis is prescribed to treat ADHD in children ages 13 years to 17 years.

Your child’s typical starting dosage will be 12.5 mg once per day. Their doctor might increase the dosage if needed. If so, they’ll wait until at least 1 week passes. Then, they’ll increase the dosage to 25 mg once per day. The maximum dosage for children is 25 mg once per day.

Is Mydayis used long term?

Yes, Mydayis is usually taken as a long-term treatment. If you and your doctor determine that it’s safe and effective for your condition, you’ll likely take it long term.

Dosage adjustments

If you have severe kidney problems, your doctor will prescribe a lower dose of Mydayis or choose a different drug.

If you take medications that interact with Mydayis, your doctor may increase or decrease your Mydayis dosage. Examples of these drugs are:

  • omeprazole (Prilosec)
  • ascorbic acid
  • tramadol (ConZip)
  • ritonavir (Norvir)

Talk with your doctor if you plan to take any new prescription or over-the-counter medications.

Below are answers to some commonly asked questions about the dosage of Mydayis.

What is the dosage equivalent if I switch from Mydayis to Adderall?

Like Mydayis, Adderall is a mixed amphetamine salts medication taken to treat attention deficit hyperactivity disorder (ADHD). A Mydayis dosage equivalent to Adderall may not work the same for everyone.

A dosage equivalent is one medication’s dose that causes the same effect in your body as another medication’s specific dose. Some research has looked at Mydayis dosage compared to Adderall dosage.

If you’re considering switching medications, talk with your doctor about how to do it safely. They’ll consider several factors, including:

  • how long each drug stays in your body
  • other medications you take
  • your health history

The process of switching between medications will likely involve two steps. First, your doctor will usually reduce your current drug’s dose slowly until you stop taking it. Then, it’s likely that they’ll slowly increase the dose of the new drug. It’s important to follow the dosage schedule your doctor provides.

Your doctor can discuss switching your medication and address your specific health needs.

What tests will I need to take before my first Mydayis dose?

Before you start on Mydayis, your doctor will run tests and ask questions about your health history. This will include a physical exam and blood tests. They’ll likely need to check your heart function, kidney function, and blood pressure. Also, they’ll ask questions to determine your risk of dependence on Mydayis.

Your doctor can discuss these tests with you. They can also discuss what their results mean for your Mydayis treatment.

What is the Mydayis dose for narcolepsy?

The drugmaker of Mydayis doesn’t have a recommended dosage for narcolepsy. Amphetamine drugs have been studied to treat narcolepsy. (Mydayis is an amphetamine.) But using Mydayis for this purpose would be an off-label use. Off-label means a doctor prescribes a medication for a condition other than its approved uses.

Talk with your doctor if you’d like information on treatment options for narcolepsy.

The dosage of Mydayis you’re prescribed may depend on several factors. These include:

  • the severity of the condition you’re taking the drug to treat
  • your age
  • other medications you may be taking
  • other conditions you may have (see “Dosage adjustments” in the “What is the dosage of Mydayis?” section above)

You’ll typically take Mydayis once per day when you wake up. It lasts 16 hours, so be sure not to take it when you need to sleep.

You can swallow Mydayis with or without food. But try to take it the same way each day. For example, if you prefer taking it with food, try to always take it with food.

If you have trouble swallowing capsules, you can sprinkle the contents on a spoonful of applesauce. Once you do, eat all the applesauce right away without chewing.

You can read more in the medication guide. You can also see this article for tips on how to take this form of medication.

For information on the expiration, storage, and disposal of Mydayis, see this article. It’s recommended that you store Mydayis in a safe place away from children.

Accessible drug containers and labels

Some pharmacies provide medication labels that:

  • have large print or use braille
  • feature a code you can scan with a smartphone to change the text to audio

Check whether your pharmacy offers these accessibility features. If they don’t, your doctor or pharmacist may be able to recommend pharmacies that do.

If you have trouble opening medication bottles, let your pharmacist know. They may be able to supply Mydayis in an easy-open container. They may also have tips to help make it simpler to open the drug’s container.

If you miss a Mydayis dose, do not take it late in the day. If you were to take it then, it might prevent you from sleeping. Instead, take it at the scheduled time the next day. Do not take two doses at a time.

If you aren’t sure whether it’s too late to take a missed dose, ask your doctor or pharmacist.

If you need help remembering to take your dose of Mydayis on time, try using a medication reminder. This can include setting an alarm or downloading a reminder app on your phone.

Do not take more Mydayis than your doctor prescribes, as this can lead to serious side effects.

Symptoms of overdose

Symptoms caused by an overdose can include:

  • restlessness
  • fast breathing
  • fever
  • nausea, vomiting, or diarrhea
  • blood pressure changes
  • overactive reflexes, such as twitching
  • shakiness
  • muscle pain
  • confusion
  • panic
  • fast heartbeat or heart rhythm problems
  • hallucinations
  • seizure

What to do in case you take too much Mydayis

Call your doctor right away if you think you’ve taken too much Mydayis. You can also call 800-222-1222 to reach America’s Poison Centers or use its online resource. But if you have severe symptoms, immediately call 911 (or your local emergency number) or go to the nearest emergency room.

Mydayis is a controlled substance. This means the drug is regulated by the government due to specific risks. Specifically, Mydayis has a high risk of dependence and misuse. (With dependence, your body needs the drug to function as usual. With misuse, a drug is taken in a way other than how it’s prescribed.)

If you stop taking Mydayis suddenly, you may have withdrawal symptoms. Withdrawal symptoms are side effects from stopping a drug on which your body is dependent. Some of these symptoms include depression and extreme fatigue.

If you’re considering stopping Mydayis, do not stop taking it suddenly. First talk with your doctor about how to decrease your dose slowly. This will help lower your risk of withdrawal symptoms.

The sections above describe the usual dosages provided by the drugmaker. If your doctor recommends Mydayis for you, they’ll prescribe the dosage that’s right for you.

Remember, you should not change your dosage of Mydayis without your doctor’s recommendation. Only take Mydayis exactly as prescribed. Talk with your doctor if you have questions or concerns about your current dosage.

Here are some examples of questions you may want to ask your doctor:

  • Will a lower dose of Mydayis have a lower risk of dependence?
  • If my current dose of Mydayis is not working well enough, will the dose be increased?
  • Can I sprinkle the Mydayis capsule contents on a food other than applesauce?
  • When should I take my dose if I work during the nighttime?
  • If I start taking a medication for depression, will my dosage of Mydayis have to change?

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Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.