Clinical Pharmacology Details


OMEPRAZOLE


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Indications & Dose:


Adult


Benign gastric and duodenal ulcers: 


(including those complicating NSAID therapy), 20mg daily for 4 weeks in duodenal ulceration or 8 weeks in gastric ulceration; in severe or  recurrent cases increase to 40mg daily; maintainance for recurrent duodenal ulcer, 20mg daily.


Duodenal ulcer associated with H. pylori: 


40mg daily with amoxycillin 750mg twice daily for 2 weeks.


Zollinger-Ellison syndrome: 


initially 60mg once daily, usual range 20-120mg daily  (above 80mg in 2 divided doses).


Reflux oesophagitis:  


20mg daily for 4 weeks, followed by a further 4-8 weeks if not fully healed; 40mg daily has been given for 8 weeks in reflux oesophagitis refractory to other treatment; may be continued at 20mg daily.


Acid related dyspepsia:


10-20mg daily for 2-4 weeks,according to response.


BY INJECTABLE


By intravenous injection: 


over 5 minutes or by intravenous infusion: 40mg completely 1 hour before surgery. I|n other disease 40 mg once daily untill oral administration possible.


Children 


Severe ulcerating reflex oesophagitis:


Children 10-20kg; 10mg once daily, increased if necessary to 20mg once daily for 4-12 weekes 


Children over 20kg,; 20mg once daily, increased if necessary to 20mg once daily, increased if necessary to 40mg once daily for 4012 weekes, to be initiated by hospital paediatricians.


Note: Pediatric oral suspention not available


 

Contraindications:

In pregnancy and lactation.

Side Effects:

CNS: Asthenia, dizziness, headache GI: Abdominal pain, constipation, diarrhea, flatulence, nausea


MS: Back pain


RESP: Cough


SKIN: Rash

Cautions:

Precautions:

Not for maintenance therapy of duodenal ulcer or GERD; elderly; children; symptomatic response does not preclude gastric malignancy.


Old age: May be used.

Interaction:

Drugs


Carbamazepine, diazepam, digoxin, glipizide, glyhuride, nifedipine, nimadipine, nisoldipine, nitrendipine: Increased concentrations of these drugs


Cefpadaxime, cefuraxime, enaracin, ketoconazole: Decreased concentrations of these drugs


Glipizide, glyhrrnide, tolbutamide: Increased absorption of these drugs, potential of hypoglycemia


Methotrexate: Case report of elevated rnethotrexate concentration


Phenytoin: Increased phenytoin concentration

Warnings:

Adverse Effects:

Lactations:

Special Precautions:

Counselling:

Side Effects Or Adverse Reactions:

Patient And Carer Advice: