Place the tablet under your tongue and let it dissolve

A sublingual tablet is designed to dissolve under your tongue rather than be swallowed whole. When you take one, you slip the tablet under your tongue, close your mouth, and wait for it to break down on its own. The tablet releases its medication through the thin tissue under your tongue, which absorbs it directly into your bloodstream. This route bypasses your digestive system, which means the medication works faster and sometimes more effectively than a swallowed tablet would.

The process is straightforward, but the details matter. You should not chew, crush, or swallow the tablet. You should not drink water or eat while the tablet is dissolving. Most sublingual tablets take between 5 and 15 minutes to fully dissolve, though some work faster. Your mouth should be relatively dry when you place the tablet—if your mouth is very wet, the tablet may dissolve too quickly or unevenly.

Key Takeaways

  • Place the tablet under your tongue and keep your mouth closed while it dissolves—do not chew or swallow it.
  • Wait 5 to 15 minutes for the tablet to break down completely before eating or drinking anything.
  • Keep your mouth as dry as possible when you place the tablet, since excess saliva can affect how it dissolves.
  • If you are unsure whether a tablet is sublingual or meant to be swallowed, check the label or ask your pharmacist before taking it.

Prepare your mouth before placing the tablet

Dry your mouth slightly before you take the tablet. You can do this by swallowing once or twice, or by gently blotting the area under your tongue with a clean tissue if it feels very wet. You do not need to dry your mouth completely—just enough that the tablet will not dissolve when ready in a pool of saliva.

If you have just eaten, drunk, or brushed your teeth, wait a few minutes. Your mouth will be wetter than usual, and that can interfere with how the tablet dissolves. Some medications work best on an empty mouth, so check your prescription label or ask your pharmacist whether you should wait after eating.

Position the tablet correctly under your tongue

Lift your tongue slightly and place the tablet in the pocket of tissue directly underneath it, toward the center of your mouth. Do not place it far back in your throat—you want it in the shallow space between your tongue and the floor of your mouth. This area has many small blood vessels close to the surface, which is why sublingual tablets work so well there.

Once the tablet is in place, lower your tongue gently over it and close your mouth. Keep your tongue relaxed and still. You can move your tongue slightly if you need to, but avoid poking at the tablet or trying to speed up the dissolving process. The tablet will break down on its own.

Wait without eating, drinking, or talking much

Do not eat or drink anything while the tablet is dissolving. Water, food, and saliva all change how the medication is absorbed. If you swallow frequently or drink water, you may wash the medication down your throat before it has fully dissolved under your tongue, which reduces how well it works.

You can talk if you need to, but try to keep it brief. Talking moves your tongue and increases saliva flow, both of which can affect the tablet's dissolving time. If you are in a situation where you cannot stay quiet for 5 to 15 minutes, let your pharmacist know—they may suggest a different form of medication.

Know what to do if the tablet does not dissolve completely

Most sublingual tablets dissolve fully within the time frame listed on your label. If you notice pieces of the tablet remaining after 20 minutes, you can swallow what is left with a small amount of water. The medication will still work, though it may take a bit longer to reach your bloodstream since some of it will now travel through your digestive system.

If this happens regularly, tell your pharmacist. The tablet may be old, damaged, or stored in conditions that affected it—humidity and heat can break down sublingual tablets faster than they should. Your pharmacist can check the expiration date and storage conditions, or suggest a different brand or form of the medication.

Store sublingual tablets in the right conditions

Sublingual tablets are sensitive to moisture and heat. Store them in a cool, dry place—usually a bedroom closet or a kitchen cabinet away from the stove. Do not store them in the bathroom, where humidity from showers can damage them. Keep them in their original container with the lid tightly closed, not in a pill organizer or loose in a bag.

Check the expiration date before you take a tablet. Expired sublingual tablets may not dissolve properly or may not work as intended. If your tablets are past their date, ask your pharmacist how to dispose of them safely—many pharmacies take back old medications.

Tell your pharmacist if you have dry mouth or other conditions

If you have a condition that causes dry mouth—such as Sjögren's syndrome, diabetes, or certain medications—sublingual tablets may not work well for you. Dry mouth means there is not enough saliva to help the tablet dissolve evenly. Tell your pharmacist about any dry mouth you experience, because they may recommend a different form of the same medication, such as a swallowed tablet or a liquid.

Similarly, if you have mouth sores, gum disease, or other oral conditions, let your pharmacist know. The tissue under your tongue needs to be healthy for sublingual medication to absorb properly. Your pharmacist can help you find a form of medication that works better for your situation.

Frequently Asked Questions

What happens if I accidentally swallow a sublingual tablet?

The medication will still work, but it may take longer to reach your bloodstream because it now has to travel through your digestive system. If you swallow it by accident once, take your next dose as scheduled. If you regularly have trouble keeping the tablet under your tongue, tell your pharmacist—they may have a different form available.

Can I drink water right after the tablet dissolves?

Wait a few minutes after the tablet has fully dissolved before you drink water. Once the medication has absorbed through the tissue under your tongue, water will not wash it away. Your pharmacist can tell you the exact wait time for your specific medication if you need to know.

Do I need to do anything special if I wear dentures?

Remove your dentures before taking a sublingual tablet. The tablet needs direct contact with the tissue under your tongue to work properly, and dentures block that contact. Once the tablet has dissolved, you can put your dentures back in.

How do I know if a tablet is sublingual or meant to be swallowed?

Check the label on your prescription bottle—it will say "sublingual" or "under the tongue" if that is how you should take it. If you are not sure, ask your pharmacist before you take the tablet. Taking a sublingual tablet the wrong way can make it less effective.