Merbentyl - General Information:

A muscarinic antagonist used as an antispasmodic and in urinary incontinence. It has little effect on glandular secretion or the cardiovascular system. It does have some local anesthetic properties and is used in gastrointestinal, biliary, and urinary tract spasms. [PubChem]

Pharmacology:

Merbentyl is an anticholinergic drug, a medication that reduces the effect of acetylcholine, a chemical released from nerves that stimulates muscles, by blocking the receptors for acetylcholine on smooth muscle (a type of muscle). It also has a direct relaxing effect on smooth muscle. Merbentyl is used to treat or prevent spasm in the muscles of the gastrointestinal tract in the irritable bowel syndrome. In addition, Merbentyl inhibits gastrointestinal propulsive motility and decreases gastric acid secretion and controls excessive pharyngeal, tracheal and bronchial secretions.

Merbentyl for patients

Dicyclomine may produce drowsiness or blurred vision. 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.

Dicyclomine is contraindicated in infants less than 6 months of age and in nursing mothers. .

In the presence of a high environmental temperature, heat prostration can occur with drug use (fever and heat stroke due to decreased sweating).

If symptoms occur the drug should be discontinued and a physician contacted.

Merbentyl Interactions

The following agents may increase certain actions or side effects of anticholinergic drugs. amantadine antiarrhythmic agents of class (e.g. quinidine), antihistamines antipsychotic agents (e.g. phenothiazines), benzodiazepines. MAO inhibitors, narcotic analgesics (e.g., meperidine), nitrates and nitrites, sympathomimetic agents, tricyclic antidepressants, and other drugs having anticholinergic activity.

Anticholinergics antagonize the effects of antiglaucoma agents. Anticholinergic drugs in the presence of increased intraocular pressure may be hazardous when taken concurrently with agents such as corti costeroids..

Anticholinergic agents may affect gastrointestinal absorption of various drugs, such as slowly dissolving dosage forms of digoxin; increased serum digoxin concentrations may result.

Anticholinergic drugs may antagonize the effects of the drugs that alter gastrointestinal motility, such as metoclopramide. Because antacids may interfere with the absorption of anticholinergic agents, simultaneous use of these drugs should be avoided.

The inhibiting effects of anticholinergic drugs on gastric hydrochloric acid secretion are antagonized by agents used to treat achlorhydria and those used to test gastric secretion.

Merbentyl Contraindications

1. Obstructive uropathy
2. Obstructive disease of the gastrointestinal tract
3. Severe ulcerative colitis
4. Reflux esophagitis
5. Unstable cardiovascular status in acute hemorrhage
6. Glaucoma
7. Myasthenia gravis
8. Evidence of prior hypersensitivity to dicyclomine hydrochloride or other ingredients of these formulations
9. Infants less than 6 months of age
10. Nursing Mothers

Additional information about Merbentyl

Merbentyl Indication: For the treatment of functional bowel/irritable bowel syndrome
including Colicky abdominal pain; diverticulitis
Mechanism Of Action: Action is achieved via a dual mechanism: (1) a specific anticholinergic effect (antimuscarinic) at the acetylcholine-receptor sites and (2) a direct effect upon smooth muscle (musculotropic).
Drug Interactions: Donepezil Possible antagonism of action
Galantamine Possible antagonism of action
Rivastigmine Possible antagonism of action
Haloperidol The anticholinergic increases the risk of psychosis and tardive dyskinesia
Food Interactions: Avoid alcohol.
Take this medication 30 minutes before meals.
Generic Name: Dicyclomine
Synonyms: Not Available
Drug Category: Anticholinergic Agents; Antispasmodics; Antimuscarinics
Drug Type: Small Molecule; Approved
Other Brand Names containing Dicyclomine: Atumin; Bentomine; Bentyl; Bentyl Hydrochloride; Bentylol; Bentylol Hydrochloride; Di-Syntramine; Dicicloverina [Inn-Spanish]; Dicyclomine Hcl; Dicyclomine Hydrochloride; Dicycloverin; Dicycloverin Hydrochloride; Dicycloverine; Dicycloverine Hydrochloride; Dicycloverinum [Inn-Latin]; Diethylaminocarbethoxybicyclohexyl Hydrochloride; Diocyl; Diocyl Hydrochloride; Dyspas; Formulex; Kolantyl Hydrochloride; Mamiesan; Merbentyl; Oxityl-P; Procyclomin; Sawamin; Spasmoban; Wyovin; Wyovin Hydrochloride;
Absorption: Not Available
Toxicity (Overdose): Not Available
Protein Binding: >99%
Biotransformation: Not Available
Half Life: Not Available
Dosage Forms of Merbentyl: Tablet Oral
Capsule Oral
Solution Intramuscular
Syrup Oral
Chemical IUPAC Name: 2-diethylaminoethyl 1-cyclohexylcyclohexane-1-carboxylate
Chemical Formula: C19H35NO2
Dicyclomine on Wikipedia: http://en.wikipedia.org/wiki/Dicyclomine
Organisms Affected: Humans and other mammals

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