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. The tissue under your tongue has many blood vessels close to the surface, which allows the medication to enter your bloodstream faster than a tablet you swallow. To take one correctly, place the tablet under your tongue, close your mouth, and wait for it to dissolve completely—usually between two and ten minutes depending on the medication and tablet size.
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 stay still and breathe normally through their nose while the tablet dissolves.
Key Takeaways
- Place the tablet directly under your tongue and keep it there until it fully dissolves, which usually takes two to ten minutes.
- Never chew, crush, or swallow a sublingual tablet, because doing so prevents the medication from working as intended.
- Avoid eating, drinking, or rinsing your mouth for at least five to ten minutes after the tablet has dissolved to let the medication absorb fully.
- If you have a dry mouth or produce very little saliva, ask your doctor or pharmacist whether a sublingual tablet is the right form for you.
- Keep sublingual tablets in a cool, dry place and check the expiration date before use, because moisture and heat can damage them.
Prepare your mouth before placing the tablet
Before you take a sublingual tablet, rinse your mouth with water and spit it out so your mouth is clean and moist. A dry mouth makes it harder for the tablet to dissolve evenly. If your mouth feels very dry, drink a small sip of water first, but do not swallow—just let your mouth become naturally moist.
Sit or lie in a comfortable position where you can keep your mouth closed and still for several minutes. Some people prefer to sit upright, while others find it easier to lie back slightly. Choose whatever position feels natural to you, as long as you can stay still without moving your tongue around.
Common mistakes that prevent the medication from working
The most common mistake is chewing or crushing the tablet. Sublingual tablets are formulated to dissolve slowly under the tongue, and breaking them up changes how the medication enters your body. If you chew the tablet, you may swallow pieces before they have time to absorb through the tissue under your tongue, which reduces how well the medication works.
Another frequent error is drinking water or eating food too soon. Many people feel uncomfortable with the tablet under their tongue and reach for water within the first minute or two. Wait until the tablet has completely dissolved and at least five to ten minutes have passed before you eat or drink anything else. If you rinse your mouth or drink water too early, you wash away the dissolved medication before it can fully absorb.
Some people also move the tablet around with their tongue or try to speed up the dissolving process by pressing it against the floor of their mouth. Let the tablet sit still and dissolve on its own. Moving it around can cause uneven dissolving and may cause you to swallow pieces before they are ready.
What to do if the tablet does not dissolve completely
Most sublingual tablets dissolve within two to ten minutes. If your tablet is still there after fifteen minutes, check whether your mouth is dry. A very dry mouth slows dissolving significantly. Take a small sip of water, hold it in your mouth without swallowing, and wait another few minutes for the tablet to continue breaking down.
If the tablet still has not dissolved after twenty minutes, or if it feels like it is breaking into hard pieces rather than softening, the tablet may be damaged or expired. Do not force it to dissolve. Remove it from your mouth, throw it away, and contact your pharmacist. They can tell you whether the tablet was stored correctly and whether you should take a replacement dose.
Storage and handling to keep tablets in good condition
Sublingual tablets are sensitive to moisture and heat, which is why they usually come in a sealed container or blister pack. Keep them in a cool, dry place—not in the bathroom, where steam from the shower can damage them. Do not store them in a car, near a window, or anywhere they might be exposed to direct sunlight or temperature changes.
Always close the container tightly after you take a tablet. If your medication comes in a bottle with a cotton pad inside, leave the pad in place—it absorbs moisture and protects the tablets. Check the expiration date before you take any tablet. Expired sublingual tablets may not dissolve properly or may not work as intended.
When to contact your pharmacist or doctor
If you have difficulty keeping a tablet under your tongue because of a dental condition, mouth sores, or a very dry mouth, tell your pharmacist. They may be able to suggest an alternative form of the same medication, such as a regular tablet you swallow or a liquid version. Do not try to force yourself to use a sublingual tablet if it causes you pain or discomfort.
If you notice that the tablet tastes unusual, smells strange, or looks discolored or crumbly, do not take it. Contact your pharmacist and describe what you observed. These signs can indicate the tablet has been damaged or stored incorrectly.
Frequently Asked Questions
Can I drink water while the tablet is dissolving under my tongue?
No. Water washes away the dissolved medication before it can absorb through the tissue under your tongue. Wait until the tablet has completely dissolved and at least five to ten minutes have passed before you drink anything.
What if I accidentally swallow the tablet whole?
Contact your pharmacist or poison control if you are concerned. In most cases, swallowing a sublingual tablet whole will not cause harm, but the medication may not work as intended because it was not absorbed under the tongue. Your pharmacist can tell you whether you need to take another dose.
How long does a sublingual tablet usually take to dissolve?
Most sublingual tablets dissolve between two and ten minutes, depending on the medication, tablet size, and how much saliva you produce. If yours takes longer, your mouth may be too dry. A small sip of water held in your mouth can help speed up the process.
Can I eat food right after the tablet dissolves?
Wait at least five to ten minutes after the tablet has completely dissolved before you eat. This gives the medication time to absorb fully through the tissue under your tongue. Eating too soon may reduce how well the medication works.
What should I do if I have a very dry mouth?
Talk to your pharmacist or doctor. A very dry mouth makes sublingual tablets difficult to use and may prevent them from dissolving properly. They may recommend a different form of your medication that works better for you.