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Hyoscyamine and Phenyltoloxamine Capsules

Generic Name: Hyoscyamine and Phenyltoloxamine Capsules (HYE oh SYE a meen & FEN il tole OX a meen)
Brand Name: Gastrinex NF

Medically reviewed on May 2, 2018.

Uses of Hyoscyamine and Phenyltoloxamine Capsules:

  • It is used to treat a nervous stomach (feeling of having butterflies).
  • It is used to slow the speed in the stomach and GI (gastrointestinal) tract.
  • It is used to treat GI (gastrointestinal) ulcers.
  • It is used to treat irritable bowel syndrome.

What do I need to tell my doctor BEFORE I take Hyoscyamine and Phenyltoloxamine Capsules?

  • If you have an allergy to hyoscyamine, phenyltoloxamine, or any other part of this medicine (hyoscyamine and phenyltoloxamine capsules).
  • If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
  • If you have any of these health problems: Certain heart problems caused by very bad bleeding; certain stomach or bowel problems like bowel blockage, loss of bowel muscle tone, or ulcerative colitis; glaucoma; myasthenia gravis; or trouble passing urine.

This is not a list of all drugs or health problems that interact with this medicine (hyoscyamine and phenyltoloxamine capsules).

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this medicine (hyoscyamine and phenyltoloxamine capsules) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Hyoscyamine and Phenyltoloxamine Capsules?

  • Tell all of your health care providers that you take this medicine (hyoscyamine and phenyltoloxamine capsules). This includes your doctors, nurses, pharmacists, and dentists.
  • Avoid driving and doing other tasks or actions that call for you to be alert or have clear eyesight until you see how this medicine (hyoscyamine and phenyltoloxamine capsules) affects you.
  • Be careful in hot weather or while being active. Drink lots of fluids to stop fluid loss.
  • Do not take antacids at the same time as this medicine (hyoscyamine and phenyltoloxamine capsules). Talk with your doctor.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this medicine (hyoscyamine and phenyltoloxamine capsules) while you are pregnant.
  • Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is this medicine (Hyoscyamine and Phenyltoloxamine Capsules) best taken?

Use this medicine (hyoscyamine and phenyltoloxamine capsules) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • Take with each meal or snack.
  • Do not open the capsules.
  • Avoid breathing the dried powder into your nose or mouth.

What do I do if I miss a dose?

  • Take a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Loose stools (diarrhea).
  • Feeling confused.
  • Not able to pass urine or change in how much urine is passed.
  • Not sweating during activities or in warm temperatures.
  • A fast heartbeat.
  • A heartbeat that does not feel normal.
  • Not able to get or keep an erection.
  • Blurred eyesight.
  • Change in eyesight.
  • Change in taste.
  • Change in speech.
  • Change in balance.

What are some other side effects of Hyoscyamine and Phenyltoloxamine Capsules?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.

See also: Side effects (in more detail)

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Hyoscyamine and Phenyltoloxamine Capsules?

  • Store at room temperature.
  • Store in a dry place. Do not store in a bathroom.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

Consumer information use

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else's drugs.
  • Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
  • Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
  • Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about this medicine (hyoscyamine and phenyltoloxamine capsules), please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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