Mediclarum
Medicine guide

Hyoscyamine Sulfate

.125 mg · Tablet

  • Prescription only
Active substance
Hyoscyamine Sulfate
Made by
Northwind Health Company, LLC

Quoted from the official source. Not yet reviewed by Mediclarum — the leaflet in your pack is authoritative.

At a glance

Quoted from the official label · 2026-01-01

Used for
  • Hyoscyamine Sulfate Tablets, USP are effective as adjunctive therapy in the treatment of peptic ulcer.
The label’s usual adult dose

Adults and pediatric patients 12 years of age and older:: 1 to 2 tablets every four hours or as needed.

Do not exceed 12 tablets in 24 hours.

Full directions ↓
Do not take it if

Glaucoma; obstructive uropathy (for example, bladder neck obstruction due to prostatic hypertrophy); obstructive disease of the gastrointestinal tract (as in achalasia, pyloroduodenal stenosis); paralytic ileus, intestinal atony of elderly or…

All warnings ↓
Good to know
  • Prescription only
  • FDA enforcement reports list no ongoing recall, and none from the last two years, for this product code · checked 2026-10-02
43other products contain Hyoscyamine Sulfate — compare makers, forms and strengths

Every line above is selected, not written, from the official label. Nothing is reworded. DailyMed

What it is for

  • Hyoscyamine Sulfate Tablets, USP are effective as adjunctive therapy in the treatment of peptic ulcer.
  • They can also be used to control gastric secretions, visceral spasm and hypermotility in spastic colitis, spastic bladder, cystitis, pylorospasm and associated abdominal cramps.
  • May be used in functional intestinal disorders to reduce symptoms such as those seen in mild dysenteries, diverticulitis and acute enterocolitis.
  • For use as adjunctive therapy in the treatment of irritable bowel syndrome (irritable colon, spastic colon, mucous colitis) and functional gastrointestinal disorders.
  • Also used as adjunctive therapy in the treatment of neurogenic bladder and neurogenic bowel disturbances (including the splenic flexure syndrome and neurogenic colon).
  • Hyoscyamine Sulfate Tablets, USP are indicated along with morphine or other narcotics in symptomatic relief of biliary and renal colic; as a “drying agent” in the relief of symptoms of acute rhinitis; in the therapy of parkinsonism to reduce rigidity and tremors and to control associated sialorrhea and hyperhidrosis.
  • May be used in the therapy of poisoning by anticholinesterase agents.

From the official label · 2026-01-01 · DailyMed

How it works

From this product’s own US prescribing label.

Hyoscyamine sulfate inhibits specifically the actions of acetylcholine on structures innervated by postganglionic cholinergic nerves and on smooth muscles that respond to acetylcholine but lack cholinergic innervation.

These peripheral cholinergic receptors are present in the autonomic effector cells of the smooth muscle, cardiac muscle, the sinoatrial node, the atrioventricular node and the exocrine glands.

Half-life2 h
Mostly cleared after≈ 10 hfive half-lives — our arithmetic
How it leaves the body

Hyoscyamine sulfate is partly hydrolyzed to tropic acid and tropine but the majority of the drug is excreted in the urine unchanged within the first 12 hours.

Quoted from the prescribing label, sections “Mechanism of Action” and “Pharmacokinetics”. DailyMed · 2026-01-01

Do not take it if

Glaucoma; obstructive uropathy (for example, bladder neck obstruction due to prostatic hypertrophy); obstructive disease of the gastrointestinal tract (as in achalasia, pyloroduodenal stenosis); paralytic ileus, intestinal atony of elderly or debilitated patients; unstable cardiovascular status in acute hemorrhage; severe ulcerative colitis; toxic megacolon complicating ulcerative colitis; myasthenia gravis.

Quoted from the official label, section “Contraindications”.

How to take it

These directions are for this exact strength and form. Another one is different.

  • Dosage may be adjusted according to the conditions and severity of symptoms.
  • Adults and pediatric patients 12 years of age and older:
  • 1 to 2 tablets every four hours or as needed.
  • Do not exceed 12 tablets in 24 hours.
  • Pediatric patients 2 to under 12 years of age:
  • 1/2 to 1 tablet every four hours or as needed.
  • Do not exceed 6 tablets in 24 hours.

Quoted from the official label, section “Dosage & Administration”.

Other warnings

  • In the presence of high environmental temperature, heat prostration can occur with drug use (fever and heat stroke due to decreased sweating).
  • Diarrhea may be an early symptom of incomplete intestinal obstruction, especially in patients with ileostomy or colostomy.
  • In this instance, treatment with this drug would be inappropriate and possibly harmful.
  • Psychosis has been reported in sensitive individuals given anticholinergic drugs including hyoscyamine sulfate.
  • CNS signs and symptoms include confusion, disorientation, short-term memory loss, hallucinations, dysarthria, ataxia, coma, euphoria, anxiety, decreased anxiety, fatigue, insomnia, agitation and mannerisms and inappropriate affect.
  • These CNS signs and symptoms usually resolve within 12 to 48 hours after discontinuation of the drug.
  • General:
  • Use with caution in patients with:
  • autonomic neuropathy, hyperthyroidism, coronary heart disease, congestive heart failure, cardiac arrhythmias, hypertension and renal disease.
  • Investigate any tachycardia before giving any anticholinergic drugs since they may increase the heart rate.
  • Use with caution in patients with hiatal hernia associated with reflux esophagitis.
  • Information for Patients:
  • Drug Interactions:
  • Carcinogenesis, Mutagenesis, Impairment of Fertility:
  • No long-term studies in animals have been performed to determine the carcinogenic, mutagenic or impairment of fertility potential of hyoscyamine sulfate; however, 40 years of marketing experience with hyoscyamine sulfate shows no demonstrable evidence of a problem.
  • Pregnancy-Pregnancy Category C:
  • Animal reproduction studies have not been conducted with hyoscyamine sulfate.
  • It is also not known whether hyoscyamine sulfate can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity.
  • Hyoscyamine sulfate should be given to a pregnant woman only if clearly needed.
  • Nursing Mothers: Hyoscyamine sulfate is excreted in human milk.
  • Geriatric Use:
  • General:
  • Use with caution in patients with:
  • autonomic neuropathy, hyperthyroidism, coronary heart disease, congestive heart failure, cardiac arrhythmias, hypertension and renal disease.
  • Investigate any tachycardia before giving any anticholinergic drugs since they may increase the heart rate.
  • Use with caution in patients with hiatal hernia associated with reflux esophagitis.

Quoted from the official label, section “Warnings”.

Pregnancy and breastfeeding

Hyoscyamine sulfate is excreted in human milk. Caution should be exercised when hyoscyamine sulfate are administered to a nursing woman.

Quoted from the official label, section “OTC — Pregnancy or Breast Feeding”.

Other medicines

  • Additive adverse effects resulting from cholinergic blockade may occur when hyoscyamine sulfate is administered concomitantly with other antimuscarinics, amantadine, haloperidol, phenothiazines, monoamine oxidase (MAO) inhibitors, tricyclic antidepressants or some antihistamines.
  • Antacids may interfere with the absorption of hyoscyamine sulfate.
  • Administer hyoscyamine sulfate before meals; antacids after meals.

Quoted from the official label, section “Drug Interactions”.

If you take too much

In an emergency, call your local emergency number or a poison control centre.

  • The signs and symptoms of overdose are headache, nausea, vomiting, blurred vision, dilated pupils, hot dry skin, dizziness, dryness of the mouth, difficulty in swallowing and CNS stimulation.
  • Measures to be taken are immediate lavage of the stomach and injection of physostigmine 0.5 to 2 mg intravenously and repeated as necessary up to a total of 5 mg.
  • Fever may be treated symptomatically (tepid water sponge baths, hypothermic blanket).
  • Excitement to a degree which demands attention may be managed with sodium thiopental 2% solution given slowly intravenously or chloral hydrate (100-200 mL of a 2% solution) by rectal infusion.
  • In the event of progression of the curare-like effect to paralysis of the respiratory muscles, artificial respiration should be instituted and maintained until effective respiratory action returns.
  • In rats, the LD50 for hyoscyamine is 375 mg/kg.
  • Hyoscyamine sulfate is dialyzable.

Quoted from the official label, section “Overdosage”.

Use in older people

  • Reported clinical experience has not identified differences in safety between patients aged 65 and over and younger patients.
  • In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function and of concomitant disease or other drug therapy.
  • This drug is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function.
  • Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function.

Quoted from the official label, section “Geriatric Use”.

Side effects

  • The following adverse reactions have been reported for hyoscyamine sulfate and for pharmacologically similar drugs with anticholinergic/antispasmodic action.
  • Adverse reactions may include dryness of the mouth; urinary hesitancy and retention; blurred vision; tachycardia; palpitations; mydriasis; cycloplegia; increased ocular tension; loss of taste; headache; nervousness; drowsiness; weakness; fatigue; dizziness; insomnia; nausea; vomiting; impotence; suppression of lactation; constipation; bloated feeling; abdominal pain; diarrhea; allergic reactions or drug idiosyncrasies; urticaria and other dermal manifestations; ataxia; speech disturbance; some degree of mental confusion and/or excitement (especially in elderly persons); short-term memory loss; hallucinations; and decreased sweating.
  • To report SUSPECTED ADVERSE REACTIONS, contact Noble Pharmaceuticals, LLC at 1-888-514-4727 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Quoted from the official label, section “Adverse Reactions”.

What to discuss with your doctor

  • Like other anticholinergic agents, hyoscyamine sulfate may produce drowsiness, dizziness or blurred vision.
  • In this event, the patient should be warned not to engage in activities requiring mental alertness such as operating a motor vehicle or other machinery or to perform hazardous work while taking this drug.
  • Use of hyoscyamine sulfate may decrease sweating resulting in heat prostration, fever or heat stroke; febrile patients or those who may be exposed to elevated environmental temperatures should use caution.

Quoted from the official label, section “Patient Counseling Information”.

What it looks like and how it is packed

  • Hyoscyamine Sulfate Tablets, USP, 0.125 mg are light blue, round, biconvex tablets, debossed with “N” on one side and “104” on the other.
  • Bottles of 30 NDC 51655-764-52
  • Store at controlled room temperature 20C°-25°C (68F°-77°F); excursion permitted to 15C°-30°C (59F°-86°F) see USP controlled room temperature.
  • Dispense in tight, light-resistant containers as defined in USP/NF with a child-resistant closure.
  • KEEP THIS AND ALL DRUGS OUT OF THE REACH OF CHILDREN.

Quoted from the official label, section “How Supplied”.

What is in it

  • Hyoscyamine Sulfate Tablets, USP contain 0.125 mg hyoscyamine sulfate formulated for oral administration. Hyoscyamine sulfate is one of the principal anticholinergic/antispasmodic components of belladonna alkaloids. The empirical formula is (C 17 H 23 NO 3 ) 2
  • H 2 SO 4
  • 2H 2 O and the molecular weight is 712.85. Chemically, it is benzeneacetic acid, α-(hydroxymethyl)-, 8-methyl-8-azabicyclo [3.2.1] oct-3-yl ester, [3(S)-endo]-, sulfate (2:1), dihydrate with the following structure:
  • Each tablet also contains as inactive ingredients:
  • corn starch, lactose monohydrate, magnesium stearate, mannitol, stearic acid, and FD&C blue #1. structure

Quoted from the official label, section “Description”.

Ingredients people check for

Lactose, gluten, dyes, sugars and other ingredients that matter with an allergy, intolerance or diet — as this product’s FDA label lists them.

  • Lactoselactose monohydrateMilk sugar: matters with lactose intolerance or a milk allergy.
  • Colour dyesFD&C blue #1Some people react to dyes such as tartrazine (Yellow 5) or carmine.
  • Sugar alcoholsmannitolSorbitol and similar can upset the stomach and matter with fructose intolerance.

Quoted from the FDA label. A label that does not name an ingredient is not a guarantee that the product is free of it, and formulations change. With an allergy, check the pack and ask a pharmacist.

Every version of this medicine (34)

The same active substance, strength and kind of form, from every company that sells it — with what each label lists.

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Details

Made byNorthwind Health Company, LLC
Active substanceHyoscyamine Sulfate
Strength.125 mg
FormTablet
RouteOral
Packs30 TABLET in 1 BOTTLE, PLASTIC
NDC51655-764

Source: NDC Directory · 2026-09-13 · not reviewed by a clinician

Source: US Food and Drug Administration, NDC Directory. Reuse terms: US government work (FDA).

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Other strengths and forms

22 products are sold under this name. Grouped by form; a number on a strength means several companies make it.

Show all forms · 6 forms

Same active substance

These contain the same substance. That does not mean one can replace another — ask a pharmacist.

Hyoscyamine Er.375 mgPrescription onlyTablet, Extended Release Mylan Pharmaceuticals Inc. · Hyoscyamine SulfateHyoscyamine Sulfate.125 mgPrescription onlyTablet NCS HealthCare of KY, LLC dba Vangard Labs · Hyoscyamine SulfateHyoscyamine Sulfate.375 mgPrescription onlyTablet, Extended Release Laser Pharmaceuticals, LLC · Hyoscyamine SulfateHyoscyamine Sulfate.125 mgPrescription onlyTablet, Orally Disintegrating Patrin Pharma, Inc. · Hyoscyamine SulfateHyoscyamine Sulfate.125 mgPrescription onlyTablet Patrin Pharma, Inc. · Hyoscyamine SulfateHyoscyamine Sulfate.375 mgPrescription onlyTablet, Extended Release Patrin Pharma, Inc. · Hyoscyamine Sulfate

See every product with Hyoscyamine Sulfate