GENERIC NAME: HYOSCYAMINE - ORAL (hi-oh-SYE-uh-meen)
BRAND NAME(S): Anaspaz, Cystospaz, Donnamar, Levsin
USES: Hyoscyamine is used to treat a variety of stomach/intestinal problems such as cramps and irritable bowel syndrome. It is also used to treat other conditions such as bladder and bowel control problems, cramping pain caused by kidney stones and gallstones, and Parkinson's disease. In addition, it is used to decrease side effects of certain medications (drugs used to treat myasthenia gravis) and insecticides.This medication works by decreasing acid production in the stomach, slowing down the natural movements of the gut, and relaxing muscles in many organs (e.g., stomach, intestines, bladder, kidney, gallbladder). Hyoscyamine also lessens the amount of certain body fluids (e.g., saliva, sweat). This medication belongs to a class of drugs known as anticholinergics/antispasmodics.
HOW TO USE: Take this medication by mouth as prescribed, usually 30-60 minutes before meals, or as directed by your doctor.Dosage is based on your medical condition and response to therapy. Do not increase your dose or take it more often than prescribed without consulting your doctor. Adults and children 12 years and older should not take more than 1.5 milligrams in 24 hours. Children aged 2 to 12 years should not take more than 0.75 milligrams in 24 hours. Ask your doctor or pharmacist for more information.Antacids lower the absorption of hyoscyamine. If you use antacids, take them after meals and take hyoscyamine before meals; or take antacids at least 1 hour after taking hyoscyamine.Drink plenty of fluids while taking this medication unless your doctor directs you otherwise.Inform your doctor if your condition persists or worsens.
Quick GuideDigestive Disorders: Common Misconceptions
SIDE EFFECTS: Dizziness, drowsiness, blurred vision, dry mouth, vision problems, headache, trouble sleeping, constipation, flushing, dry skin, and decreased sweating may occur. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.To relieve dry mouth, suck on (sugarless) hard candy or ice chips, chew (sugarless) gum, drink water or use a saliva substitute.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes (e.g., confusion, unusual excitement), fast/irregular heartbeat, difficulty urinating, decreased sexual ability, loss of coordination, slurred speech, eye pain, vomiting.A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
PRECAUTIONS: Before taking hyoscyamine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: glaucoma (narrow-angle type, untreated open-angle type), enlarged prostate, urinary blockage problems, certain stomach/intestinal problems (e.g., slow gut, blockage, severe ulcerative colitis, infection), heart problems due to severe bleeding.Before using this medication, tell your doctor or pharmacist your medical history, especially of: overactive thyroid, other heart problems (e.g., coronary heart disease, congestive heart failure, fast heartbeat, arrhythmias), high blood pressure, kidney disease, heartburn problems (acid reflux, hiatal hernia), certain nervous system problem (autonomic neuropathy), myasthenia gravis.Contact lens wearers may need to use wetting eye drops since this medication can cause dry eyes.This drug may make you dizzy or drowsy or cause blurred vision. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages.This drug may increase the risk for heatstroke because it decreases sweating. Avoid becoming overheated in hot weather, saunas, and during exercise or other strenuous activity.Older adults may be more sensitive to the side effects of this drug, especially confusion, drowsiness, unusual excitement, constipation, and difficulty urinating. Confusion and drowsiness can increase the risk of falling.Children may be more sensitive to the effects of this drug.Hyoscyamine should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor.This drug passes into breast milk. Consult your doctor before breast-feeding.
DRUG INTERACTIONS: See also How to Use.Your healthcare professionals (e.g., doctor or pharmacist) may already be aware of any possible drug interactions and may be monitoring you for it. Do not start, stop or change the dosage of any medicine before checking with them first.This drug should not be used with the following medications because very serious interactions may occur: pramlintide.If you are currently using any of these medications listed above, tell your doctor or pharmacist before starting hyoscyamine.Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: amantadine, certain anti-arrhythmic drugs (e.g., disopyramide, procainamide, quinidine), anticholinergic drugs (e.g., atropine, glycopyrrolate, scopolamine), antispasmodic drugs (e.g., clidinium, dicyclomine, propantheline), certain anti-Parkinson's drugs (e.g., levodopa, benztropine, trihexyphenidyl), certain azole anti-fungal drugs (ketoconazole, itraconazole), belladonna alkaloids, bisphosphonate drugs (e.g., alendronate, risedronate), corticosteroids (e.g., prednisone), digoxin (slow-dissolving tablets), MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine), phenothiazines (e.g., promethazine), potassium tablets/capsules.Tell your doctor or pharmacist if you also take drugs that cause drowsiness such as: certain antihistamines (e.g., diphenhydramine, meclizine), anti-seizure drugs (e.g., carbamazepine), medicine for sleep or anxiety (e.g., alprazolam, diazepam, zolpidem), muscle relaxants, narcotic pain relievers (e.g., codeine), psychiatric medicines (e.g., chlorpromazine, haloperidol, amitriptyline, risperidone).Check the labels on all your medicines (e.g., cough-and-cold products) because they may contain drowsiness-causing ingredients. Ask your pharmacist about the safe use of those products.This product can affect the results of certain lab tests. Make sure laboratory personnel and your doctors know you use this drug.This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.
OVERDOSE: If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include hot/dry skin, fever, unusual excitement, fast/irregular heartbeat, seizures.
NOTES: Do not share this medication with others.Management of digestive disorders may include lifestyle changes such as stress reduction programs, exercise, stopping smoking, and dietary changes to increase the effectiveness of this medicine. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.
MISSED DOSE: If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
STORAGE: Store at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
Information last revised December 2013. Copyright(c) 2013 First Databank, Inc.
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