Nipodur (Ranitidine Hydrochloride)

Nipodur (ranitidine) is employed in the management of acid‑related gastrointestinal disorders.

• Gastro‑oesophageal reflux disease (GERD): reduces reflux symptoms and promotes healing of the esophageal lining.
• Peptic ulcer disease: facilitates ulcer healing by lowering gastric acidity.
• Erosive esophagitis: protects damaged esophageal tissue and supports mucosal recovery.
• Zollinger‑Ellison syndrome: controls excessive gastric acid secretion associated with gastrin‑producing tumours.

• Ranitidine competitively blocks histamine H2 receptors on gastric parietal cells, preventing histamine‑mediated stimulation of the proton pump. This inhibition reduces cyclic AMP formation, leading to a marked decrease in gastric acid secretion and an increase in gastric pH, thereby providing symptomatic relief and allowing mucosal healing.

Like other H2 antagonists, ranitidine may cause a range of adverse reactions.

Common Side Effects

• Headache: mild to moderate intensity.
• Dizziness: transient sensation of light‑headedness.
• Constipation: occasional reduced bowel movements.
• Diarrhoea: loose stools, usually self‑limiting.
• Nausea: mild stomach upset.
• Rash: mild skin erythema or itching.

Serious or Rare Side Effects

• Anaphylaxis: severe allergic reaction requiring immediate medical attention.
• Liver dysfunction: elevated transaminases or hepatitis.
• Thrombocytopenia: reduced platelet count, may cause bleeding.
• Cardiac arrhythmia: irregular heart rhythm, especially in predisposed patients.
• Neutropenia: low neutrophil count, increasing infection risk.
• Interstitial nephritis: inflammation of kidney interstitium, may impair renal function.

When prescribing Nipodur, several safety considerations should be reviewed.

• Renal function: assess and adjust dose in patients with severe impairment.
• Liver function: monitor hepatic enzymes in individuals with liver disease.
• Hypersensitivity: discontinue immediately if allergic reaction occurs.
• Pregnancy: use only if the potential benefit outweighs the potential risk to the fetus.
• Elderly: start with the lowest effective dose and monitor for adverse effects.
• Store at room temperature: keep in the original container, protect from moisture and heat.

Ranitidine can affect the pharmacokinetics of several co‑administered medicines.

Major Interactions (Avoid)

• Ketoconazole: markedly reduced absorption; separate administration by at least 2 hours.
• Atazanavir: decreased plasma levels; avoid concomitant use.
• Itraconazole: reduced efficacy; avoid co‑administration.
• Iron salts: impaired iron absorption; separate dosing.
• Sucralfate: decreased effectiveness; avoid together.

Moderate Interactions (Monitor Closely)

• Warfarin: possible increased anticoagulant effect; monitor INR.
• Theophylline: increased clearance; observe serum levels.
• Cimetidine (if used): additive H2 blockade; watch for excess acid suppression.
• Digoxin: slight increase in serum concentration; monitor for toxicity.
• Methotrexate: reduced renal clearance; monitor renal function and drug levels.