Zantac Tablet

Ranitidine
150mg
Glaxo SmithKline Pharmaceuticals Ltd.
Pack size 30's
Dispensing mode
Source
Agent
Retail Price 1.05 NPR

Indications

Zantac Tablet is used for: Dyspepsia, H. pylori infection, Benign gastric and duodenal ulceration, GERD, Acid aspiration during general anesth, Prophylaxis during NSAID treatment, Stress ulceration of upper GI, Zollinger-Ellison syndrome

Adult Dose

Oral Benign gastric and duodenal ulceration Adult: Initially, 300 mg daily at bedtime or 150 mg bid for 4-8 wk; 300 mg bid for 4 wk may be used in duodenal ulcer to improved healing. Maintenance: 150 mg daily at bedtime. Max: 300 mg bid. Hypersecretory conditions Adult: Initially, 150 mg bid or tid and increased if needed. Max: 6 g daily. Gastro-oesophageal reflux disease Adult: 150 mg bid or 300 mg at bedtime for up to 8 wk, may increase to 150 mg 4 times daily for 12 wk in severe cases. Dyspepsia Adult: Chronic episodic: 150 mg bid for up to 6 wk. Short-term symptomatic relief: 75 mg repeated if necessary up to 4 doses daily. Max duration: 2 wk of continuous use at one time. Erosive oesophagitis Adult: 150 mg 4 times daily. Maintenance: 150 mg bid. NSAID-associated ulceration Adult: 150 mg bid or 300 mg at bedtime for 8-12 wk. For prevention of NSAID-associated ulceration: 150 mg bid. Hepatic impairment: Dosage adjustment not necessary

Child Dose

Oral Benign gastric and duodenal ulceration Child: 1 mth to 16 yr 4-8 mg/kg daily in 2 divided doses. Max: 300 mg/day. Treatment duration: 4-8 wk. Maintenance: 2-4 mg/kg once daily. Max: 150 mg/day. Gastro-oesophageal reflux disease Child: 1 mth to 16 yr 5-10 mg/kg daily in 2 divided doses. Max: 300 mg/day. Erosive oesophagitis Child: 1 mth to 16 yr 5-10 mg/kg daily in 2 divided doses. Max: 600 mg/day.

Renal Dose

Oral: CrCl Dosage <50 150 mg daily at bedtime, adjust dose cautiously if necessary.Parenteral: Individual doses may be reduced to 25 mg.

Administration

May be taken with or without food. IV Administration Direct injection: 50 mg diluted to ?20 mL with compatible IV infusion fluid and given over ?5 minutes (4 mL/min) Intermittent infusion: 50 mg added to ?100 mL of compatible IV solution and infused over 15-20 minutes Continuous infusion: 150 mg diluted in 250 mL of IV fluid and infused at 6.25 mg/hr for 24 hours

Contra Indications

Porphyria.

Precautions

Possibility of malignancy should be excluded prior to therapy as the drug may mask symptoms and delay diagnosis of gastric malignancy. Patients w/ difficulty in swallowing. Renal and hepatic impairment. Pregnancy and lactation. Lactation: Drug crosses into breast milk; discontinue drug, use caution

Pregnancy-Lactation

Interactions

Delayed absorption and increased peak serum concentration w/ propantheline bromide. Ranitidine minimally inhibits hepatic metabolism of coumarin anticoagulants, theophylline, diazepam and propanolol. May alter absorption of pH-dependent drugs (e.g. ketoconazole, midazolam, glipizide). May reduce bioavailability w/ antacids.

Adverse Effects

Side effects of Ranitidine : 1-10% Headache (3%) <1% Abdominal pain,Agitation,Alopecia,Confusion,Constipation,Diarrhea,Dizziness,Hypersensitivity reaction,Nausea,Vomiting Frequency Not Defined Anemia,Necrotizing enterocolitis in fetus or newborn,Pancreatitis (rare),Thrombocytopenia (rare),Pancytopenia (rare),Agranulocytosis (rare),Acquired immune hemolytic anemia (rare),Arthralgia (rare),Myalgia (rare) Potentially Fatal: Anaphylaxis, hypersensitivity reactions.

Mechanism of Action

Ranitidine competitively blocks histamine at H2-receptors of the gastric parietal cells which inhibits gastric acid secretion. It does not affect pepsin secretion, pentagastrin-stimulated intrinsic factor secretion or serum gastrin.

Note

Zantac 150mg Tablet manufactured by Glaxo SmithKline Pharmaceuticals Ltd.. Its generic name is Ranitidine. Zantac is availble in Nepal. Farmaco Nepal drug index information on Zantac Tablet is not intended for diagnosis, medical advice or treatment; neither intended to be a substitute for the exercise of professional judgment.

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