Place the tablet under your tongue and let it dissolve

Sublingual tablets work by dissolving under your tongue rather than being swallowed whole. The tissue under your tongue has many blood vessels close to the surface, which allows the medication to enter your bloodstream quickly without passing through your stomach first. To take a sublingual tablet correctly, place it under your tongue, close your mouth, and wait for it to dissolve completely—usually two to ten minutes depending on the tablet.

Do not chew, crush, or swallow the tablet. Do not drink water or eat food while the tablet is dissolving. Saliva will naturally help break down the tablet, so you do not need to do anything except keep it in place and wait. Some people find it helpful to sit or lie down while the medication dissolves, especially if they feel lightheaded or unwell.

Key Takeaways

  • Place the tablet under your tongue and keep it there until it dissolves completely—do not chew or swallow it.
  • Avoid eating, drinking, or rinsing your mouth for at least five to ten minutes after the tablet has fully dissolved.
  • If you accidentally swallow the tablet or it falls out of your mouth, do not take another dose unless your doctor or pharmacist tells you to.
  • Store sublingual tablets in a cool, dry place away from moisture, because humidity can damage them and make them less effective.
  • Tell your doctor or pharmacist if the tablet does not dissolve, tastes unusual, or causes unexpected side effects.

Prepare your mouth before placing the tablet

Rinse your mouth with water and spit it out a few minutes before taking your sublingual tablet. A dry mouth can slow down how quickly the tablet dissolves. If your mouth is very dry, take a small sip of water to moisten it, then spit out the excess. You want your mouth slightly moist but not so wet that saliva washes the tablet away when ready.

Avoid eating, drinking, smoking, or using mouthwash for at least five minutes before you take the tablet. These activities can interfere with how the medication dissolves and how well it works. If you have just eaten or brushed your teeth, wait a few minutes before taking your sublingual tablet.

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 back of your mouth. This area has the most blood vessels and allows the fastest absorption. The tablet should sit flat against the floor of your mouth, not pressed against the side of your tongue or your gum.

Keep your mouth closed and breathe normally through your nose. Do not move the tablet around with your tongue or try to speed up the dissolving process. Some tablets are small enough to fit easily; others are larger and may feel awkward at first. If the tablet keeps falling out, you may have a naturally dry mouth, and your doctor or pharmacist can suggest ways to help it stay in place.

Wait for complete dissolution without swallowing

Most sublingual tablets take between two and ten minutes to dissolve completely, though some may take longer. You will feel the tablet getting smaller as your saliva breaks it down. Resist the urge to swallow until the tablet has fully dissolved—swallowing too early means the medication goes into your stomach instead of absorbing under your tongue, which reduces how well it works.

If you feel saliva building up in your mouth, you can swallow the saliva alone without moving the tablet. Once the tablet has completely dissolved, you can swallow normally. Some people notice a slight taste or tingling sensation under their tongue; this is normal and does not mean anything is wrong.

What to do after the tablet dissolves

After the tablet has fully dissolved, do not eat, drink, or rinse your mouth for at least five to ten minutes. This waiting period allows the medication to be absorbed completely through the tissue under your tongue. If you rinse your mouth or drink water too soon, you may wash away medication that has not yet been absorbed.

If you need to take another dose later, follow the same steps. Never take a double dose to make up for a missed one unless your doctor tells you to. If you are unsure whether you took your dose or how long ago you took it, contact your pharmacist or doctor before taking another tablet.

Common mistakes to avoid

The most common mistake is chewing or swallowing the tablet instead of letting it dissolve. This defeats the purpose of the sublingual route and may make the medication less effective or change how quickly it works. Another mistake is drinking water or eating food while the tablet is dissolving, which washes it away or interferes with absorption.

Do not store sublingual tablets in a bathroom medicine cabinet, because humidity from showers and baths can damage them. Keep them in a cool, dry place in a sealed container. If a tablet looks discolored, crumbly, or smells unusual, do not use it—ask your pharmacist for a replacement. If you have trouble keeping the tablet under your tongue or if it causes pain or irritation, tell your doctor or pharmacist; they may recommend a different form of the medication.

Frequently Asked Questions

What if I accidentally swallow the sublingual tablet?

If you swallow the tablet by accident, do not take another dose right away. Contact your pharmacist or doctor to ask whether you should take another dose and when. Swallowing the tablet means it will be absorbed through your stomach instead of under your tongue, which may change how quickly it works or how effective it is.

Can I drink water while the tablet is dissolving?

No. Water will wash away the tablet or dilute it before it can be fully absorbed. Wait until the tablet has completely dissolved and then wait another five to ten minutes before drinking anything. If your mouth is very dry, take a small sip of water before placing the tablet, then spit out the excess.

How do I know when the tablet has fully dissolved?

You will no longer feel the tablet under your tongue when it has completely dissolved. The tablet will gradually get smaller as your saliva breaks it down. If you are unsure, wait a bit longer before swallowing. It is better to wait too long than to swallow before the tablet is gone.

What should I do if the tablet keeps falling out of my mouth?

A tablet that keeps falling out usually means your mouth is too dry. Try rinsing your mouth with water and spitting out the excess a few minutes before taking the tablet, so your mouth is slightly moist. If this does not help, tell your pharmacist or doctor—they may have suggestions or recommend a different form of medication.

Can I store sublingual tablets in my bathroom?

No. Bathrooms are humid, and moisture can damage sublingual tablets and make them less effective. Store them in a cool, dry place like a bedroom closet or kitchen cabinet, away from direct sunlight and heat. Keep them in their original sealed container to protect them from air and humidity.