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Hyoscyamine is a custom pharmacy drug classified within the family of drugs known as anticholinergics/antispasmodics. Hyoscyamine can be effective in many ways, improving conditions and relieving symptoms. Hyoscyamine has been effective in some patients as a stomach acid reducer; as a muscle relaxer in internal organs such as the bladder, kidneys, intestines, stomach, etc.; and as a means to decrease production of certain bodily fluids such as saliva and sweat. Hyoscyamine is often given as a treatment drug for a wide variety of intestinal problems and to reduce the negative side effects of certain medications.


Hyoscyamine can be delivered as an extended-release capsule, a tablet, or liquid or possibly other form. Ask your doctor which method of delivery is right for you. Each form of delivery has its own dosage schedule, etc. so consult with your doctor about this and follow his or her directions. Never take more than prescribed.


Any medication or drug has the potential to cause side effects that are unwanted. Watch for side effects while taking this drug and contact your doctor if any side effect is lingering or worsening. Some of the more commonly reported side effects are listed below, though it is important to note this is only a partial list.

  • Flushing
  • Difficulty Urinating
  • Dizziness
  • Feeling Lightheaded
  • Dry Mouth
  • Constipation
  • Headaches
  • Blurred Vision
  • Sensitivity to Light
  • Drowsiness

Possibly Serious and Severe Side Effects:

If you experience any of the following possibly serious and severe side effects, get medical treatment at once:

  • Eye Pain
  • Irregular Heartbeat
  • Accelerated Heartbeat
  • Skin Rash
  • Diarrhea


There are many conditions, diseases, drug interactions, and situations that could make the use of hyoscyamine inadvisable and/or contraindicate its use. Check with your doctor about all possible contraindications before using this drug in any form.

Hyoscyamine may be contraindicated for all of the following conditions; check with your doctor if any of the following apply to you:

  • Obstructive Uropathy
  • Glaucoma
  • Unstable Cardiovascular Status
  • Myasthenia Gravis
  • Obstructive Disease of Gastrointestinal Tract
  • Paralytic Ileus
  • Toxic Megacolon Complicating Ulcerative Colitis
  • Severe Ulcerative Colitis
  • "It is rare to find health professionals who are so willing to educate the patient on what they need to know."

    Clair C. | West Hollywood, CA