What orally disintegrating tablets are and how they work

Orally disintegrating tablets (ODTs) are medications designed to dissolve on your tongue without needing water. They break down into a liquid or powder within seconds of contact with saliva, then you swallow the residue. The tablet does not need to be chewed, crushed, or swallowed whole — the disintegration happens automatically in your mouth.

These tablets are useful for people who have trouble swallowing pills, cannot take water with their medication, or need faster absorption than a standard tablet. Common medications available as ODTs include certain antihistamines, anti-nausea drugs, and some psychiatric medications. The active ingredient is the same as in regular tablets; the difference is only in how the tablet breaks apart.

Key Takeaways

  • Remove the tablet from the blister pack only when you are ready to take it, because moisture in the air will soften it.
  • Place the tablet on your tongue and let it dissolve without chewing or adding water — saliva alone does the work.
  • Do not remove the tablet from the blister pack ahead of time or store it in a humid bathroom, as both will ruin the tablet.
  • If you have a dry mouth condition, ask your pharmacist whether an ODT is the right choice for you, because you may not produce enough saliva to dissolve it.
  • Some ODTs have a specific taste or texture; if you find it unpleasant, your pharmacist may have an alternative form of the same medication.

Step-by-step instructions for taking an orally disintegrating tablet

Step 1: Remove the tablet from the blister pack only when you are ready to use it. Do not open the package early or remove multiple tablets at once. ODTs are sensitive to moisture and will begin to soften or stick together if exposed to air. Keep the blister pack sealed until the moment you take the dose.

Step 2: Peel back the foil or plastic backing. Most ODT blister packs have a foil or plastic backing you peel away from the front. Some packs have a small tab you pull; others require you to push the tablet through the backing. Follow the direction printed on the package. Do not try to pop the tablet out by pressing from the back, as this can break it.

Step 3: Place the tablet directly on your tongue. Once the tablet is free, put it on your tongue when ready. You do not need to add water, and you should not chew it. The tablet will begin to dissolve right away as saliva contacts it.

Step 4: Wait for the tablet to dissolve completely. This usually takes 10 to 30 seconds, depending on the medication and how much saliva you produce. You may feel the tablet breaking apart or notice a taste. This is normal. Do not try to speed up the process by chewing or drinking water.

Step 5: Swallow the residue. Once the tablet has fully dissolved, swallow the liquid or powder that remains. You can swallow normally without water, though you may drink water afterward if you wish.

Storage and handling to keep tablets effective

ODTs must be stored in a cool, dry place — not in a bathroom medicine cabinet, where humidity from showers will damage them. Keep the blister pack sealed in your medicine cabinet or a drawer until you need a dose. If your home is very humid or you live in a tropical climate, ask your pharmacist whether a different storage location (such as a cool closet) would be better.

Never transfer ODTs to a pill organizer or loose container, even for a few days. The tablets will absorb moisture and become unusable. If you use a pill organizer for other medications, keep ODTs in their original blister pack and remove them only at the time of use.

Check the expiration date on the package before taking a dose. ODTs that have expired or been exposed to moisture may not dissolve properly or may deliver the wrong amount of medication. If a tablet looks discolored, feels sticky, or has an unusual odor, do not take it — discard it and use a fresh tablet from a new blister pack.

What to do if you have difficulty producing saliva

ODTs require enough saliva to dissolve properly. If you have dry mouth (a condition called xerostomia), take medications that cause dry mouth, or are undergoing radiation therapy, you may not produce enough saliva for the tablet to break down. In this case, tell your pharmacist before taking an ODT.

Your pharmacist can suggest an alternative form of the same medication — such as a regular tablet, a liquid, or a capsule — that will work better for you. Do not try to force an ODT to work by adding water or chewing it, as this defeats the purpose of the formulation and may change how the medication is absorbed.

Common mistakes to avoid

Do not open the blister pack until you are ready to take the tablet. Opening it early exposes the tablet to air and humidity, which will soften or ruin it within minutes.

Do not chew the tablet or try to swallow it whole. ODTs are designed to dissolve on the tongue. Chewing changes the taste and texture, and swallowing it whole may prevent proper dissolution and absorption.

Do not add water to the tablet or drink water while it is dissolving. The tablet needs only saliva. Adding water can cause it to dissolve unevenly or too quickly, and may affect how your body absorbs the medication.

Do not store ODTs in a humid environment, such as a bathroom cabinet or near a kitchen sink. Keep them in a cool, dry place in their original blister pack. If you live in a very humid climate, consider storing them in an airtight container with a desiccant packet (the small silica gel packet that comes in some medication packages).

When to contact your pharmacist or doctor

If the tablet does not dissolve within a minute or feels unusually hard, do not take it. Contact your pharmacist, as the tablet may be defective or damaged. If you have taken a dose and experience unexpected side effects, unusual taste, or feel that the medication is not working as it should, tell your pharmacist or doctor.

If you find the taste or texture of the ODT unpleasant, ask your pharmacist whether the same medication is available in a different form. Many drugs come in multiple formulations, and your pharmacist can help you find one that works better for you.

Frequently Asked Questions

Can I take an orally disintegrating tablet with food?

Most ODTs can be taken with or without food, but check the label or ask your pharmacist about your specific medication. Some drugs are absorbed better on an empty stomach, while others are not affected by food. If the label says to take it with food, you can eat normally and then take the tablet on your tongue — you do not need to wait for your mouth to be empty.

What if I accidentally swallow the tablet whole?

Swallowing an ODT whole will not harm you. The tablet will dissolve in your stomach instead of your mouth, and you will still receive the full dose. However, the medication may be absorbed more slowly or less completely than intended. If this happens once, it is not a problem — just take the next dose as directed.

Can I cut or crush an orally disintegrating tablet?

No. Cutting or crushing an ODT will damage the formulation and may change how quickly or completely your body absorbs the medication. If you need a smaller dose, ask your doctor or pharmacist whether a lower-strength tablet is available, or whether a different form of the medication would work for you.

How long can I keep an orally disintegrating tablet after removing it from the blister pack?

Once removed from the blister pack, an ODT will begin to absorb moisture from the air within seconds. You should place it on your tongue and let it dissolve when ready. Do not remove a tablet and then wait to take it — this will ruin the tablet.

What should I do if the tablet sticks to my fingers when I remove it?

If the tablet feels sticky or soft when you remove it, it has already absorbed moisture and may not dissolve properly. Do not take it. Discard it and remove a fresh tablet from a new blister pack. Make sure you are storing the blister pack in a cool, dry place, and avoid opening it in humid environments such as a steamy bathroom.