
Eucon50 mg/2 ml
Pacific Pharmaceuticals Ltd.

Neoceptin R 50 mg/2 ml Hydrochloride is a histamine H2-receptor antagonist (H2 blocker) indicated for the treatment and prevention of a range of acid-related gastrointestinal disorders. It works by reducing gastric acid secretion, allowing the healing of acid-damaged mucosa and relieving acid-related symptoms. Neoceptin R 50 mg/2 ml is indicated for the following conditions:
Neoceptin R 50 mg/2 ml is indicated for the short-term treatment of active duodenal ulcers — peptic ulcers involving the first part of the small intestine (duodenum). Most duodenal ulcers heal within 4 weeks of therapy. Neoceptin R 50 mg/2 ml is also indicated for the maintenance therapy of healed duodenal ulcers at reduced doses to prevent relapse — a common problem with this condition.
Neoceptin R 50 mg/2 ml is indicated for the short-term treatment of active benign gastric ulcers (stomach ulcers not associated with malignancy). Most gastric ulcers heal within 6–8 weeks of Neoceptin R 50 mg/2 ml therapy. Maintenance therapy at reduced doses is also indicated to reduce the frequency of gastric ulcer recurrence.
Neoceptin R 50 mg/2 ml is indicated for the treatment of gastroesophageal reflux disease (GERD) — a chronic condition characterized by the backward flow of stomach acid into the esophagus, causing heartburn, regurgitation, and esophageal irritation. It provides symptomatic relief and suppresses acid to promote mucosal healing in GERD.
Neoceptin R 50 mg/2 ml is indicated for the healing and maintenance of erosive esophagitis — a more severe form of GERD where the esophageal lining has been damaged by chronic acid exposure. After initial healing, maintenance therapy reduces the risk of recurrence of esophageal erosions.
Neoceptin R 50 mg/2 ml is indicated for the long-term treatment of pathological hypersecretory conditions where the stomach produces excessive acid, including:
Neoceptin R 50 mg/2 ml injection is used in hospitalized patients, particularly in intensive care settings, to prevent stress-related gastric mucosal damage and upper GI bleeding in critically ill patients (including those on mechanical ventilation, with severe burns, major trauma, or following major surgery).
Intravenous Neoceptin R 50 mg/2 ml may be used as an adjunct to epinephrine in the management of anaphylaxis for additional relief of histamine-mediated urticaria and hives. It should not be used as the primary or sole treatment of anaphylaxis, as it does not address airway obstruction or cardiovascular shock.
H2 receptor antagonist
Neoceptin R 50 mg/2 ml Hydrochloride is a competitive and reversible inhibitor of histamine action at the histamine H2-receptor, including those located on the basolateral membrane of gastric parietal cells. It belongs to the second generation of H2 blockers and offers greater potency and longer duration of action compared to cimetidine (the first H2 blocker).
Gastric acid secretion by parietal cells is regulated by three primary stimulants — histamine, gastrin, and acetylcholine. Of these, histamine-mediated activation of H2 receptors plays the central and most important role:
Neoceptin R 50 mg/2 ml competitively and reversibly blocks H2 receptors on parietal cells, inhibiting histamine-stimulated acid secretion. By blocking H2 receptors, Neoceptin R 50 mg/2 ml also indirectly reduces the amplifying effect of histamine on gastrin- and acetylcholine-stimulated acid secretion, producing a comprehensive reduction in acid output.
Neoceptin R 50 mg/2 ml doses depend on the indication, route of administration, age, and renal function. Always follow your registered physician's prescribed dose. Do not self-medicate. Use the lowest effective dose for the shortest appropriate duration.
Maximum parenteral daily dose: 400 mg/day for most indications. Higher doses may be used for Zollinger-Ellison syndrome under close supervision.
Neoceptin R 50 mg/2 ml affects drug bioavailability through multiple mechanisms — primarily by altering gastric pH (affecting pH-dependent absorption) and by competing with other drugs for renal tubular secretion. Unlike cimetidine, Neoceptin R 50 mg/2 ml has minimal inhibitory activity on hepatic cytochrome P450 enzymes at standard doses, making it a safer option in patients on multiple medications. However, the following interactions are clinically relevant:
By raising intragastric pH, Neoceptin R 50 mg/2 ml can reduce the oral absorption and efficacy of drugs that require an acidic environment for dissolution or absorption:
Oral Neoceptin R 50 mg/2 ml 150 mg twice daily increased oral midazolam exposure by up to 65% and triazolam exposure by approximately 30% in clinical pharmacokinetic studies. The proposed mechanism includes both reduced gastric acid-mediated midazolam metabolism and possible inhibition of intestinal CYP3A4 at higher gastric pH. Monitor patients for excessive or prolonged sedation when Neoceptin R 50 mg/2 ml is co-administered with oral benzodiazepines metabolized by CYP3A4. Note: the interaction was smaller (approximately 9% increase) with IV midazolam.
Neoceptin R 50 mg/2 ml may increase the serum concentration of warfarin — likely through inhibition of warfarin metabolism (minor CYP2C9 inhibition at standard doses). There have been reported cases of increased INR and bleeding in patients on warfarin and Neoceptin R 50 mg/2 ml. Monitor INR/prothrombin time when initiating, changing, or discontinuing Neoceptin R 50 mg/2 ml in patients on warfarin therapy.
Neoceptin R 50 mg/2 ml may reduce renal tubular secretion of procainamide (an antiarrhythmic agent), increasing its plasma concentration and potentially increasing the risk of procainamide toxicity (hypotension, arrhythmias, lupus-like syndrome). Monitor procainamide levels during concurrent use.
Antacids may slightly reduce the rate (but not overall extent) of Neoceptin R 50 mg/2 ml absorption. Antacids may be used concurrently for breakthrough pain relief, but should ideally be administered at different times (approximately 1–2 hours apart) from Neoceptin R 50 mg/2 ml to minimize any reduction in Neoceptin R 50 mg/2 ml absorption.
Neoceptin R 50 mg/2 ml may decrease the levels of sotorasib (a KRAS G12C inhibitor) and defactinib by increasing gastric pH, reducing their oral absorption and potentially compromising anti-cancer efficacy. Avoid concurrent use with these agents if possible; if unavoidable, follow specific timing guidelines as per current prescribing information.
Neoceptin R 50 mg/2 ml Hydrochloride is contraindicated in the following situations:
Neoceptin R 50 mg/2 ml is generally well tolerated at recommended doses. Most adverse effects are mild and transient. The following adverse effects have been reported across clinical trials, post-marketing surveillance, and routine clinical use:
The US FDA Pregnancy Category for Neoceptin R 50 mg/2 ml is Category B. Animal reproduction studies performed at doses substantially exceeding the human therapeutic dose have not demonstrated evidence of fetal malformations, teratogenicity, or impaired fertility. However, there are no adequate and well-controlled studies specifically in pregnant women. Because animal reproduction studies are not always predictive of human response, Neoceptin R 50 mg/2 ml should be used during pregnancy only if clearly necessary and when the potential benefit to the mother justifies any theoretical risk to the fetus.
Neoceptin R 50 mg/2 ml is considered one of the safer acid-suppressive agents during pregnancy when clinically indicated. It has been used by many pregnant women without evidence of harm, and the overall safety data in pregnancy are reassuring — but, as with all medications during pregnancy, use should be under physician supervision and limited to cases where treatment is genuinely required.
Neoceptin R 50 mg/2 ml is secreted into human breast milk. Neoceptin R 50 mg/2 ml concentrations in breast milk can reach approximately two-thirds of corresponding plasma concentrations, suggesting meaningful infant exposure during breastfeeding. Caution should be exercised when Neoceptin R 50 mg/2 ml is administered to nursing mothers. The decision to continue breastfeeding while taking Neoceptin R 50 mg/2 ml should involve weighing the benefits of breastfeeding for the infant against the potential for drug exposure through breast milk. The physician should guide this decision on an individual basis.
Symptomatic response to Neoceptin R 50 mg/2 ml therapy does not exclude the presence of gastric malignancy. Neoceptin R 50 mg/2 ml relieves symptoms of gastric cancer as effectively as it relieves benign peptic ulcer symptoms, potentially masking the diagnosis and delaying appropriate treatment. When gastric ulcer is suspected, malignancy must be excluded before initiating Neoceptin R 50 mg/2 ml therapy. Any patient with alarm symptoms (unexplained weight loss, dysphagia, persistent vomiting, hematemesis, iron-deficiency anaemia, or a palpable abdominal mass) should undergo endoscopy before treatment.
Since Neoceptin R 50 mg/2 ml is substantially excreted by the kidney, the risk of toxic reactions is significantly greater in patients with impaired renal function. Dose adjustment is mandatory in patients with creatinine clearance below 50 mL/min. Renal function should be assessed before initiating Neoceptin R 50 mg/2 ml and monitored regularly during treatment, particularly in elderly patients who are more likely to have occult renal impairment.
Neoceptin R 50 mg/2 ml is partially metabolized in the liver. Caution should be exercised in patients with hepatic dysfunction, as impaired hepatic metabolism may increase drug exposure. In severe hepatic impairment, dose adjustment may be necessary and liver function should be monitored. Rare cases of hepatitis with jaundice have been reported — discontinue Neoceptin R 50 mg/2 ml if significant liver injury is suspected or confirmed.
Rare reports suggest that Neoceptin R 50 mg/2 ml may precipitate acute porphyric attacks in susceptible patients. Neoceptin R 50 mg/2 ml should be avoided in patients with a history of acute porphyria.
Rapid or bolus intravenous injection of Neoceptin R 50 mg/2 ml has been associated with bradycardia, hypotension, and cardiac arrhythmias. IV Neoceptin R 50 mg/2 ml must always be administered slowly — direct IV injection should be given over at least 5 minutes (rate ≤4 mL/min). Continuous or intermittent IV infusions should be administered over 15–20 minutes. Cardiac monitoring is advisable in patients with pre-existing cardiac disease receiving parenteral Neoceptin R 50 mg/2 ml.
Confusion, agitation, and hallucinations have been reported with Neoceptin R 50 mg/2 ml — predominantly in severely ill elderly patients and in those with hepatic or renal impairment. These CNS effects are reversible upon discontinuation. Extra vigilance is required in this patient population.
Use of Neoceptin R 50 mg/2 ml may increase the risk of developing pneumonia — potentially by raising gastric pH and allowing bacterial colonization of normally sterile gastric contents, with subsequent aspiration. Symptoms of pneumonia (chest pain, fever, shortness of breath, productive cough) should be reported to a physician promptly.
Prolonged Neoceptin R 50 mg/2 ml treatment may lead to reduced vitamin B12 absorption through suppression of gastric acid (which is required to cleave B12 from food proteins). The risk is dose-related and greater in younger female patients. Annual vitamin B12 testing is advisable in patients on long-term Neoceptin R 50 mg/2 ml therapy; supplementation may be required in those who develop B12 deficiency.
Neoceptin R 50 mg/2 ml may cause false-positive results for urine protein using the Multistix® reagent strip. When testing for proteinuria in patients taking Neoceptin R 50 mg/2 ml, use the sulfosalicylic acid precipitation test as an alternative method to avoid false results.
In 2019–2020, the probable human carcinogen N-nitrosodimethylamine (NDMA) was detected in Neoceptin R 50 mg/2 ml products from multiple manufacturers, leading to global market withdrawals including the US FDA's request in April 2020 and suspension across the EU and Australia. NDMA levels were found to increase in Neoceptin R 50 mg/2 ml products over time and at elevated temperatures. In November 2025, the FDA approved a reformulated Neoceptin R 50 mg/2 ml with improved manufacturing controls and stability testing demonstrating NDMA levels within internationally accepted limits. In countries where Neoceptin R 50 mg/2 ml is currently available (including Bangladesh), patients and physicians should ensure products are sourced from manufacturers with adequate quality controls. If in doubt, discuss alternative acid-suppressing medications (famotidine, proton pump inhibitors) with your physician.
Neoceptin R 50 mg/2 ml has a wide therapeutic margin. Clinical experience with intentional and accidental overdose suggests good tolerability even at very high doses. The following is known from overdose reports:
In the event of suspected Neoceptin R 50 mg/2 ml overdose, contact a poison control center or seek emergency medical care immediately.
Neoceptin R 50 mg/2 ml pharmacokinetics are altered in elderly patients due to age-related decline in renal function, reduced hepatic metabolic capacity, and increased volume of distribution. The plasma half-life is prolonged and total drug clearance is reduced. No routine dose adjustment is recommended based on age alone, but since elderly patients are more likely to have reduced renal function, renal function should be assessed before and during Neoceptin R 50 mg/2 ml therapy, with dosing adjusted accordingly. Elderly patients are at higher risk of CNS adverse effects (confusion, hallucinations) and should be monitored accordingly.
The safety and effectiveness of Neoceptin R 50 mg/2 ml have been established in pediatric patients from 1 month to 16 years of age for the treatment of duodenal and gastric ulcers, GERD, and erosive esophagitis. Weight-based dosing (mg/kg) is required — see Dosage section for specific recommendations. The safety and effectiveness of Neoceptin R 50 mg/2 ml in neonates under 1 month of age have not been established. Very rare cases of necrotizing enterocolitis have been reported in very low-weight neonates receiving IV Neoceptin R 50 mg/2 ml, and its use in this group requires careful clinical judgement.
Since Neoceptin R 50 mg/2 ml is primarily excreted by the kidneys (approximately 30–70% of a dose is excreted unchanged in the urine), dose adjustment is mandatory in patients with creatinine clearance below 50 mL/min (see Dosage section). In hemodialysis patients, Neoceptin R 50 mg/2 ml is removed by dialysis — ideally schedule doses to coincide with the end of a dialysis session to restore therapeutic drug levels. Continuous IV infusion of Neoceptin R 50 mg/2 ml has not been adequately evaluated in patients with severe renal impairment.
Neoceptin R 50 mg/2 ml undergoes partial hepatic metabolism. In patients with severe hepatic dysfunction, reduced drug clearance may lead to accumulation and increased adverse effects — including CNS effects. Caution is advised, and dose adjustment may be necessary in severe hepatic impairment. Liver function should be monitored during Neoceptin R 50 mg/2 ml therapy in patients with significant hepatic disease.
Slow IV inj: Neoceptin R 50 mg/2 ml 50 mg diluted to a concentration ≤2.5 mg/mL (e.g. total of 20 mL) with NaCl 0.9% inj or dextrose 5% or 10%, lactated Ringer's, Na bicarbonate 5% soln. Intermittent slow IV infusion: Neoceptin R 50 mg/2 ml 50 mg diluted to a concentration ≤0.5 mg/mL (e.g. total of 100 mL) of dextrose 5% inj or NaCl 0.9%, lactated Ringer's, Na bicarbonate 5% soln. Continuous IV infusion: Neoceptin R 50 mg/2 ml 150 mg diluted in 250 mL of dextrose 5% inj or NaCl 0.9%, lactated Ringer's, Na bicarbonate 5% soln. Patients with Zollinger-Ellison syndrome or other hypersecretory conditions: Neoceptin R 50 mg/2 ml should be diluted to a concentration ≤2.5 mg/mL with dextrose 5% or NaCl 0.9%, lactated Ringer's, Na bicarbonate 5% soln.
What is Neoceptin R 50 mg/2 ml used for?
Neoceptin R 50 mg/2 ml Hydrochloride is a histamine H2-receptor antagonist (H2 blocker) indicated for the treatment and prevention of a range of acid-related gastrointestinal disorders. It works by reducing gastric acid secretion, allowing the healing of acid-damaged mucosa and relieving acid-related symptoms. Neoceptin R 50 mg/2 ml is indicated for the following conditions: Duodenal Ulcer Neocept…
What is the dosage of Neoceptin R 50 mg/2 ml?
Neoceptin R 50 mg/2 ml doses depend on the indication, route of administration, age, and renal function. Always follow your registered physician's prescribed dose. Do not self-medicate. Use the lowest effective dose for the shortest appropriate duration. Adults — Oral Indication Dose Frequency Duration Active Duodenal Ulcer (treatment) 150 mg twice daily or 300 mg once daily at bedtime Twice daily…
What are the side effects of Neoceptin R 50 mg/2 ml?
Neoceptin R 50 mg/2 ml is generally well tolerated at recommended doses. Most adverse effects are mild and transient. The following adverse effects have been reported across clinical trials, post-marketing surveillance, and routine clinical use: Common Side Effects Headache — the most frequently reported adverse effect; sometimes severe but generally resolves with continued treatment Abdominal dis…
Who should not take Neoceptin R 50 mg/2 ml?
Neoceptin R 50 mg/2 ml Hydrochloride is contraindicated in the following situations: Known hypersensitivity to Neoceptin R 50 mg/2 ml Hydrochloride or to any excipient in the formulation. Hypersensitivity reactions may include urticaria, angioedema, fever, bronchospasm, and anaphylaxis. Known hypersensitivity to other H2 receptor antagonists — cross-reactivity between H2 blockers (cimetidine, famo…
What precautions should be taken with Neoceptin R 50 mg/2 ml?
Exclude Gastric Malignancy Before Treatment Symptomatic response to Neoceptin R 50 mg/2 ml therapy does not exclude the presence of gastric malignancy. Neoceptin R 50 mg/2 ml relieves symptoms of gastric cancer as effectively as it relieves benign peptic ulcer symptoms, potentially masking the diagnosis and delaying appropriate treatment. When gastric ulcer is suspected, malignancy must be exclude…
Is Neoceptin R 50 mg/2 ml safe during pregnancy and breastfeeding?
Pregnancy The US FDA Pregnancy Category for Neoceptin R 50 mg/2 ml is Category B . Animal reproduction studies performed at doses substantially exceeding the human therapeutic dose have not demonstrated evidence of fetal malformations, teratogenicity, or impaired fertility. However, there are no adequate and well-controlled studies specifically in pregnant women. Because animal reproduction studie…
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