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Oxyphencyclimine Hydrochloride
Before using Oxyphencyclimine Hydrochloride, it is essential for patients to consult their healthcare provider due to several important precautions associated with this medication:
- Caution in Pre-existing Conditions: Oxyphencyclimine has anticholinergic properties, so caution is needed in patients with glaucoma, urinary retention, intestinal obstruction, myasthenia gravis, or severe heart disease. These conditions could be exacerbated by the anticholinergic effects.
- Elderly Patients: Older adults are more likely to experience the side effects of Oxyphencyclimine, such as drowsiness, confusion, and blurred vision, which may impair their ability to perform tasks requiring mental alertness.
- CNS Effects: Due to its central nervous system (CNS) depressant properties, Oxyphencyclimine can cause sedation and dizziness, leading to potential falls and other accidents. Patients should be advised to avoid operating heavy machinery or driving while on the medication.
- Drug Interactions: Oxyphencyclimine can interact with other medications that affect the CNS, such as other anticholinergics, antihistamines, or sedative drugs. These interactions may increase the risk of adverse effects such as confusion, dry mouth, urinary retention, and constipation.
- Pregnancy and Breastfeeding: This drug falls under Category C in pregnancy, which means it may pose a risk to the fetus. It should only be used if the potential benefit outweighs the risks. Additionally, Oxyphencyclimine may pass into breast milk, so it should be avoided while breastfeeding unless the potential benefits justify the risks.
Oxyphencyclimine Hydrochloride is primarily used as an antispasmodic agent. Its therapeutic indications include:
- Gastrointestinal Disorders: It is often prescribed to treat irritable bowel syndrome (IBS) and other conditions where intestinal spasms or discomfort are present. The drug helps to relax the smooth muscles in the GI tract, reducing the symptoms of cramps and bloating.
- Peptic Ulcer Disease: Oxyphencyclimine may be used to reduce gastric acid secretion and relieve symptoms associated with peptic ulcers. It can provide symptomatic relief by decreasing motility and relaxing the gastrointestinal muscles.
- Post-operative GI Disturbances: It can also be used after surgery to manage abdominal cramping or irritability of the intestines following certain procedures.
- Chronic Diarrhea and Abdominal Pain: Oxyphencyclimine may be prescribed for patients suffering from chronic gastrointestinal conditions associated with abdominal pain or frequent diarrhea, where muscle spasms contribute to symptoms.
Oxyphencyclimine Hydrochloride should not be used in the following situations:
- Glaucoma: This drug is contraindicated in patients with angle-closure glaucoma due to the potential for worsening intraocular pressure.
- Urinary Retention: It is contraindicated in patients with urinary retention or obstructive uropathy, as it may worsen these conditions by decreasing urinary flow.
- Severe Cardiac Conditions: Patients with severe heart disease, including arrhythmias or heart failure, should avoid using this medication due to potential effects on heart rate and rhythm.
- Myasthenia Gravis: Oxyphencyclimine is contraindicated in myasthenia gravis, a condition in which the effectiveness of neuromuscular transmission is impaired. This medication can exacerbate muscle weakness.
- Hypersensitivity: Patients with a known hypersensitivity or allergic reaction to Oxyphencyclimine or any component of the formulation should not take this medication.
Common and severe side effects associated with Oxyphencyclimine Hydrochloride include:
- Common Side Effects:
- Dry Mouth: A frequent anticholinergic side effect that may cause discomfort and difficulty swallowing.
- Constipation: Oxyphencyclimine can slow bowel movements, leading to constipation, which may require additional interventions.
- Drowsiness: Patients may experience sedation, fatigue, and drowsiness, affecting daily activities.
- Blurred Vision: As a result of its anticholinergic properties, Oxyphencyclimine can impair accommodation and cause blurry vision.
- Urinary Retention: Difficulty urinating or feeling unable to fully empty the bladder can occur.
- Severe Side Effects:
- Confusion: Especially in elderly individuals, confusion and memory impairment can occur.
- Tachycardia: Increased heart rate may be a sign of cardiac arrhythmia or excessive anticholinergic activity.
- Severe Dizziness: Severe dizziness or lightheadedness may occur, particularly with rapid dose increases.
- Severe Allergic Reactions: Rare, but serious allergic reactions may include rash, swelling, or difficulty breathing.
Oxyphencyclimine Hydrochloride works by blocking the effects of acetylcholine at muscarinic receptors, leading to its anticholinergic effects. Specifically:
- Inhibition of Smooth Muscle Contraction: By inhibiting acetylcholine, Oxyphencyclimine reduces smooth muscle contraction in the gastrointestinal system, thus helping alleviate spasms and cramping.
- Reduction of Gastrointestinal Motility: It slows down the movement of food through the stomach and intestines, providing relief in conditions like irritable bowel syndrome (IBS).
- Decreased Gastric Acid Secretion: It can also lower the secretion of gastric acid, which helps to relieve symptoms of gastric ulcers and acid reflux.
Oxyphencyclimine may interact with a variety of medications and substances, potentially altering its effectiveness or leading to harmful side effects:
- CNS Depressants: When combined with CNS depressants like benzodiazepines, barbiturates, or alcohol, the sedative effects of Oxyphencyclimine can be enhanced, leading to drowsiness, dizziness, and impaired coordination.
- Other Anticholinergic Drugs: Using Oxyphencyclimine with other anticholinergic medications (e.g., atropine, scopolamine, or antihistamines) may intensify anticholinergic effects, such as dry mouth, constipation, blurred vision, and urinary retention.
- Antacids: Antacids can reduce the absorption of Oxyphencyclimine, potentially lowering its effectiveness. It is recommended to avoid taking them simultaneously and to space them out by a couple of hours.
- Antidiarrheal Medications: Combining Oxyphencyclimine with antidiarrheal medications like loperamide may lead to over-drying effects on the gut, exacerbating constipation and slowing the gut motility excessively.
For Oxyphencyclimine Hydrochloride, the usual recommended dose is:
- Adult Starting Dose: Typically, the initial dose is 1 mg to 2 mg taken orally, two to three times a day.
- Dose Adjustments: The dosage can be adjusted depending on the patient's response to treatment. The maximum daily dose usually does not exceed 6 mg/day.
Patients should follow their healthcare provider’s dosing schedule, and the drug should be taken at regular intervals for optimal effectiveness.
The use of Oxyphencyclimine Hydrochloride in pediatric patients is generally not recommended. The drug’s safety and efficacy in children have not been established. In children under the age of 18, alternative treatments should be considered for conditions like abdominal cramps or gastrointestinal spasms.
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In patients with renal impairment, the dosage of Oxyphencyclimine Hydrochloride may need to be reduced. Kidney disease can impair drug elimination, leading to accumulation and increased risk of side effects. It is important for patients with renal dysfunction to be closely monitored, and dosing adjustments should be based on the severity of renal impairment.
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