Hyoscyamine Oral: Uses, Side Effects, Interactions ... - WebMD

Who should not use hyoscyamine?

Allergies to Ingredients. People who are allergic to any of the following should not take hyoscyamine.

• Hyoscyamine
• Anaspaz
• Cystospaz
• NuLev
• Levbid
• Levsin
• Symax
• Any of the ingredients in the specific product dispensed

Your pharmacist can tell you all of the ingredients in the specific hyoscyamine products they stock.

Do not take hyoscyamine if you have any of the following conditions.

• Glaucoma
• Obstructive uropathy, a condition where the flow of urine is blocked 
• Stomach or intestinal blockage, such as achalasia or pyloric stenosis
• Paralytic ileus, a condition where your intestines are unable to move food
• Severe ulcerative colitis or toxic megacolon
• Myasthenia gravis

What should I know about hyoscyamine before using it?

Do not take hyoscyamine unless it has been prescribed to you by a health care provider. Take it as prescribed.

Do not share hyoscyamine with other people, even if they have the same condition as you. It may harm them.

Keep hyoscyamine out of the reach of children.

Use an accurate measuring device to measure your dose of hyoscyamine elixir. A household spoon is not an accurate measuring device and may cause you to take the wrong dose. Ask your pharmacist what measuring device to use.

Do not crush or chew hyoscyamine extended-release tablets. Your body may not completely break down hyoscyamine extended-release tablets. You may see some parts of the tablet in your poop. This is normal. 

Try to avoid hot weather and stay hydrated while taking hyoscyamine to help prevent heatstroke. 

What should I tell my health care provider before using hyoscyamine?

Tell your health care provider about all of your health conditions and any prescription or over-the-counter (OTC) medicines, vitamins/minerals, herbal products, and other supplements you are using. This will help them know if hyoscyamine is right for you.

In particular, make sure that you discuss any of the following.

Current and Past Health Conditions. Tell your health care provider if you have any of the following.

• Autonomic neuropathy
• Hyperthyroidism
• Heart problems including heart disease, congestive heart failure, abnormal heart rhythm (arrhythmia), fast heartbeat (tachycardia), and high blood pressure
• Kidney problems
• Hiatal hernia that causes acid reflux

Other Medicines and Supplements. Hyoscyamine may interact with other medicines and supplements. Before taking hyoscyamine, tell your health care provider about any prescription or over-the-counter (OTC) medicines, vitamins/minerals, herbal products, and other supplements you are using. See the Interactions section for more details.

Stomach Surgery. Tell your health care provider if you have ever had a type of stomach surgery called an ileostomy or colostomy. 

Pregnancy. It is not known if or how hyoscyamine could affect pregnancy or harm an unborn baby. Tell your health care provider if you are pregnant or plan to become pregnant. Your health care provider will let you know if you should take hyoscyamine while you are pregnant or trying to get pregnant.

Breastfeeding. Hyoscyamine passes into breast milk. Tell your health care provider if you are breastfeeding or plan to breastfeed. Your health care provider will let you know if you should take hyoscyamine while breastfeeding.