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Hyoscyamine sublingual tablet dosage: A detailed guide

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Form and strengthDosageFAQHow it's takenCouponOverdoseAsk your doctor
Doctors prescribe hyoscyamine sublingual tablet for certain gastrointestinal disorders, certain bladder or kidney problems, or runny nose. You take it by placing it under your tongue three to four times per day.
Medically reviewed by Fallon Mumford, PharmD
Updated on

This article describes hyoscyamine sublingual tablet’s dosage and strength and gives details on how to take it. You’ll also find information on cost savings and coupon options for hyoscyamine. If you want to know more about hyoscyamine sublingual tablet, talk with your doctor.

Hyoscyamine sublingual tablet is a generic medication. It’s not available in a brand-name version. Hyoscyamine also comes in other forms, but those forms aren’t described in this article. To learn more about those forms, talk with your doctor.

Note: The Food and Drug Administration (FDA) has not approved hyoscyamine. This is because the drug has been available since before the FDA began its drug approval process. If you have questions about this, talk with your doctor or pharmacist.

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Form and strength of hyoscyamine

Hyoscyamine sublingual tablet comes as follows:

  • Form: sublingual tablet, which you’ll take by placing it under your tongue
  • Strength: 0.125 milligram (mg)

Dosage of hyoscyamine

This article describes the recommended dosage for hyoscyamine sublingual tablet. The drugmaker provides this dosage.

Doctors may prescribe hyoscyamine to help treat or reduce symptoms of certain gastrointestinal conditions (for example, irritable bowel syndrome, peptic ulcer, or diverticulitis) or certain bladder or kidney problems (for example, cystitis). Doctors also may prescribe hyoscyamine to help relieve symptoms of acute rhinitis (inflammation of your nasal cavity lining), such as runny nose.

If your doctor prescribes this medication, you should follow the dosage they prescribe. Your doctor will determine the dosage that best meets your needs. Do not change your dosage of hyoscyamine sublingual tablet without your doctor’s recommendation.

Usual recommended dosage of hyoscyamine in adults

Usually, doctors start by prescribing a low dosage of hyoscyamine sublingual tablet. Then, they’ll adjust it over time until the right dosage is reached. Ultimately, your doctor will prescribe the smallest dosage of hyoscyamine sublingual tablet that gives the desired outcome. Your specific dosage will depend on your condition and its severity.

Starting dosageUsual maintenance dosageMaximum dosage
1 to 2 tablets three to four times per day1 to 2 tablets three to four times per day12 tablets in 24 hours

Dosage of hyoscyamine in children

Hyoscyamine has been used in children ages 12 years and older. The dosage is the same as that shown above for adults.

Dosage adjustments for hyoscyamine

Your doctor will prescribe a dosage of hyoscyamine sublingual tablet based on several factors. These include:

  • the specific condition being treated and how severe it is
  • your age
  • how well it works for you
  • other health conditions you may have

Missed dose of hyoscyamine

Talk with your doctor or pharmacist if you realize you forgot to take a dose of hyoscyamine sublingual tablet. They may advise you to take the missed dose. Or they may advise you to skip it and take your next dose as scheduled.

For tips on how to plan your doses of hyoscyamine sublingual tablet and avoid missing a dose, read this article. You could also try:

  • downloading a reminder app on your phone
  • setting an alarm
  • putting a note where you’ll see it, such as on your calendar, bathroom mirror, or bedside table

Frequently asked questions

Below are answers to some commonly asked questions about hyoscyamine sublingual tablet and its dosage.

Do older adults need to take a lower dose of hyoscyamine?

It depends. Older adults may be more sensitive to the usual recommended adult dosage. Your doctor may prescribe you a lower dosage and monitor you closely. Talk with your doctor for more information.

Is hyoscyamine taken long term?

No, doctors don’t typically prescribe hyoscyamine sublingual tablet as a long-term treatment. Instead, it’s usually recommended for short-term use.

If you have questions about how long you should take hyoscyamine sublingual tablet, talk with your doctor.

How hyoscyamine is taken

You’ll place the hyoscyamine sublingual tablet under your tongue as often as prescribed by your doctor.

You should take hyoscyamine 30 minutes to 1 hour before meals and at bedtime. You can take it with or without water.

You should use hyoscyamine cautiously while exercising or in hot weather as it may cause you to overheat, which can lead to heatstroke.

You should also be careful before driving, using machinery, or doing other tasks that require you to be alert. Hyoscyamine may cause drowsiness, dizziness, or blurred vision.

Also, be sure to talk with your doctor or pharmacist if you’re having difficulty taking your medication. They can offer recommendations about taking it.

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Overdose of hyoscyamine

It’s important that you do not take more hyoscyamine sublingual tablet than your doctor prescribes. Doing so can lead to harmful effects.

Symptoms of hyoscyamine overdose

Symptoms of an overdose can include:

  • headache
  • nausea
  • vomiting
  • blurred vision
  • dilated pupils
  • dizziness
  • hot, dry skin
  • dryness of mouth
  • difficulty swallowing
  • central nervous system stimulation (such as increases in energy and alertness)

What to do if you take too much hyoscyamine

If you think you’ve taken too much hyoscyamine, call your doctor or pharmacist right away. Or you could call 800-222-1222 to speak with someone at America’s Poison Centers. You can also use its online resource. If you have severe symptoms, call 911 or a local emergency number immediately. You can also go to the closest emergency room.

What to ask your doctor

This article describes the usual recommended dosage for hyoscyamine sublingual tablet. If your doctor prescribes this medication, they’ll determine the dosage that’s best for you.

Do not change your dosage of hyoscyamine sublingual tablet without your doctor’s recommendation. You should take hyoscyamine sublingual tablet exactly as your doctor prescribes it. Let your doctor know if you have concerns or questions about your treatment plan.

Here’s a list of some possible questions you may want to ask your doctor:

  • How often should I take hyoscyamine?
  • How do I take sublingual tablets?
  • When will you increase my hyoscyamine dosage?

Disclaimer: Optum Perks has made every effort to make certain that all information is factually correct, comprehensive, and up to date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or another healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.

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