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Generic name: galantaminega-LAN-ta-meen ]
Brand names: Razadyne, Razadyne ER
Dosage form: tablet
Drug class: Cholinesterase inhibitors

Medically reviewed by Melisa Puckey, BPharm. Last updated on Aug 23, 2023.

What is Razadyne?

Razadyne is used to treat mild to moderate Alzheimer's type dementia by improving the function of nerve cells in the brain. Razadyne works by increasing the amount of a natural substance in the brain called  acetylcholine (ah see til KO leen) which is needed for processes of memory, thinking and reasoning.  People with dementia usually have lower levels of this substance,  and by increasing the acetylcholine levels Razadyne may improve the ability to think and remember or slow the loss of these abilities. 


Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Before taking this medicine

You should not use Razadyne if you are allergic to it, or any of the inactive ingredients contained in the product.

To make sure Razadyne is safe for you, tell your doctor if you have:


Tell your doctor if you are pregnant or plan to become pregnant. It is not known whether Razadyne will harm an unborn baby.


Tell your doctor if you are breastfeeding or planning to breastfeed. It is not known whether this medicine passes into breast milk or if it could affect the nursing baby. 

How should I take Razadyne?

Take Razadyne exactly as prescribed by your doctor. Your doctor may occasionally change your dose to make sure you get the best results. Do not use this medicine in larger or smaller amounts or for longer than recommended.

Read all patient information, medication guides, and instruction sheets provided to you. Ask your doctor or pharmacist if you have any questions.

Take Razadyne with a full glass of water. Drink 6 to 8 full glasses of water each day to keep from getting dehydrated while taking this medication.

If you need surgery, tell the surgeon ahead of time that you are using Razadyne. You may need to stop using the medicine for a short time.

If you have stopped taking Razadyne for any reason, talk with your doctor before you start taking it again. You may need to restart the medication at a lower dose.

 Razadyne Extended-release capsule 

Razadyne extended-release capsule is usually taken once per day in the morning. Follow your doctor's instructions.

The extended-release capsule works best if you take it with food.

Do not crush, chew, break, or open an extended-release capsule. Swallow it whole.

 Razadyne short-acting tablet or the oral solution (liquid) 

The Razadyne short-acting tablet or the oral solution (liquid) are usually given two times per day, with meals. Follow your doctor's instructions.

Measure liquid medicine with the dosing syringe provided or with a special dose-measuring spoon or medicine cup. If you do not have a dose-measuring device, ask your pharmacist for one.


Usual Adult Dose for Alzheimer's Disease:

Immediate release tablet and oral solution:

Initial dose:

Maintenance dose:

Maximum dose:

Extended release capsule:

Initial dose:

Maintenance dose:

Maximum dose:

Conversion from Immediate-Release (IR) Tablets or Oral Solution to Extended-Release (ER) Capsules:


What happens if I miss a dose?

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Overdose symptoms may include severe nausea, vomiting, stomach cramps, muscle weakness or spasm, watery eyes, drooling, increased urination or bowel movements, sweating, slow heart rate, feeling light-headed or fainting, and seizure (convulsions).

What should I avoid while taking Razadyne?

This medication may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.

Razadyne side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Razadyne can cause serious skin reactions. Stop using Razadyne and call your doctor at once if you have the first signs of any skin rash, no matter how mild.

Razadyne may cause serious side effects. Call your doctor at once if you have:

Common side effects of Razadyne may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What other drugs will affect Razadyne?

Tell your doctor about all your current medicines and any you start or stop using, especially:

This list is not complete. Other drugs may interact with galantamine, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.


Razadyne ER extended-release capsules should be stored at 25°C (77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].

Razadyne® Tablets should be stored at 25°C (77°F); excursions permitted to 15-30°C (59-86°F) [see USP Controlled Room Temperature].


Janssen Pharmaceuticals, Inc.

Titusville, NJ 08560

Popular FAQ

Yes, Razadyne ER is a prescription medicine used to treat mild to moderate Alzheimer's disease. Alzheimer's disease is a brain disorder that results in problems with memory, thinking and reasoning skills, and activities of daily living. The exact cause of Alzheimer's disease is not known, but may involve changes in brain chemicals. Continue reading

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.