Nexum Capsule 40mg

Indications

Nexum is prescribed for the following:

• Alleviation of chronic heartburn and other symptoms linked to GERD (gastroesophageal reflux disease).
• Healing of erosive esophagitis.
• Maintenance of healing for erosive esophagitis.
• In combination with amoxicillin and clarithromycin, to eradicate Helicobacter pylori infection in patients with duodenal ulcers.
• Zollinger-Ellison syndrome.
• Acid-related indigestion (dyspepsia).
• Duodenal and gastric ulcers.

Pharmacology

Esomeprazole, a proton pump inhibitor, decreases stomach acid production by targeting and inhibiting the H+/K+-ATPase enzyme in the stomach’s parietal cells. As the S-isomer of omeprazole, it’s the first single optical isomer among proton pump inhibitors, offering superior acid control compared to its racemic counterparts.

Absorption: Esomeprazole capsules contain enteric-coated pellets. After oral intake, peak plasma concentration (Cmax) is achieved around 1.5 hours (Tmax). Cmax increases in proportion to dosage, with a threefold increase in plasma area under the curve (AUC) as doses increase.

Dosage

Oral Dosage:

• Erosive Esophagitis Healing: 20 mg or 40 mg once daily for 4–8 weeks. If healing doesn’t occur within this period, consider extending treatment for another 4–8 weeks.
• Maintenance of Erosive Esophagitis Healing: 20 mg once daily (studies did not extend beyond six months).
• Symptomatic GERD: 20 mg once daily for 4 weeks. If symptoms persist after 4 weeks, consider another 4-week course.
• Eradication of Helicobacter pylori: Triple therapy with esomeprazole 40 mg once daily, amoxicillin 1000 mg twice daily, and clarithromycin 500 mg twice daily, all for 10 days.
• Zollinger-Ellison Syndrome: 20–80 mg once daily, with doses individualized based on patient needs.
• Acid-related Dyspepsia: 20–40 mg daily for 2–4 weeks.
• Duodenal Ulcers: 20 mg once daily for 2–4 weeks.
• Gastric Ulcers: 20–40 mg once daily for 4–8 weeks.

IV Injection/Infusion:

• Adults (18+ years) with GERD and erosive esophagitis: 20 mg or 40 mg once daily. IV injection should last at least 3 minutes; infusion should last 10–30 minutes.
• Pediatrics (1 year to 17 years):
  • Bodyweight < 55 kg: 10 mg once daily.
  • Bodyweight ≥ 55 kg: 20 mg once daily.
  • 1 month to < 1 year: 0.5 mg/kg once daily.
• Risk reduction of ulcer re-bleeding: An initial 80 mg IV infusion over 30 minutes, followed by continuous infusion at 8 mg/h for 72 hours.

Administration

• Tablets/Capsules: Swallow whole, one hour before meals.
• Oral Suspension: Mix contents with 15 ml of water, stir, and let it sit for 2–3 minutes to thicken. Stir again and drink within 30 minutes. For nasogastric or gastric tube administration, mix the contents in 15 ml of water, shake, and administer within 30 minutes.
• IV Injection: Reconstitute with 5 ml of 0.9% sodium chloride. The solution should be clear to slightly yellow and must be used within 12 hours. Administer over 3 minutes.

Drug Interactions

Nexum is metabolized by the liver enzymes CYP2C19 and CYP3A4. It is unlikely to inhibit other CYP enzymes, meaning interactions with drugs metabolized by these enzymes, such as phenytoin, warfarin, quinidine, clarithromycin, or amoxicillin, are not expected. However, Nexum may reduce the clearance of drugs like diazepam, which is metabolized by CYP2C19. This can increase diazepam levels in the body.

Nexum’s effect on stomach acid production can also affect the absorption of drugs that rely on acidic conditions for proper absorption (e.g., ketoconazole, iron salts, and digoxin).

Contraindications

Nexum is contraindicated for patients with known hypersensitivity to any of its ingredients.

Side Effects

Common side effects include headache, diarrhea, nausea, flatulence, stomach pain, constipation, and dry mouth. No significant differences in side effects were observed between short-term and long-term use.

Pregnancy and Lactation

There are no adequate studies on Nexum use during pregnancy. Animal studies haven’t shown any teratogenic effects. Since the excretion of Nexum in breast milk hasn’t been studied, breastfeeding should be stopped if Nexum use is deemed necessary.

Precautions and Warnings

• General: Nexum therapy might mask symptoms of gastric malignancy.
• Patient Information: Take Nexum capsules at least an hour before meals. For patients who have trouble swallowing, the capsule can be opened and mixed with a spoonful of applesauce, and consumed immediately without chewing. Antacids can be taken with Nexum.

Special Populations

• Pediatric: Safety and effectiveness for pediatric use have not been fully established.
• Geriatric: No significant differences in Nexum’s safety and efficacy have been noted between elderly and younger adults, though some elderly individuals might exhibit greater sensitivity.
• Hepatic Insufficiency: For patients with mild to moderate liver impairment, no dose adjustment is required. However, those with severe liver impairment should not exceed 20 mg per day.
• Renal Insufficiency: As Nexum is minimally excreted via urine, no dosage adjustment is necessary for patients with renal impairment.

Overdose

Overdosing on Nexum can lead to symptoms such as reduced motor activity, tremors, breathing difficulties, and convulsions. There is no known antidote for Nexum, and it is not expected to be removed by dialysis. Treatment should focus on managing symptoms.

Storage

Store Nexum below 30°C in a dry place, protected from light and moisture. Keep out of reach of children.

Common Questions

• What is Nexum 40 mg used for?
  Nexum 40 mg is a proton pump inhibitor that reduces stomach acid production. It is used to treat GERD, ulcers, and other acid-related conditions.

• What are the side effects of Nexum?
  Side effects may include headache, nausea, diarrhea, stomach pain, gas, constipation, and dry mouth. These are consistent with both short-term and long-term use.

• Is Nexum safe during pregnancy or breastfeeding?
  Though there are no known adverse effects in pregnancy or breastfeeding, consult your doctor to assess the risks and benefits.

• How long does Nexum take to work?
  It typically begins to work within a few hours of administration.

Quick Tips

• Nexum provides long-lasting relief.
• Avoid eating late at night.
• Report any persistent stomach pain or diarrhea to your doctor.
• Long-term use may lead to weakened bones or mineral deficiencies, so ensure adequate calcium and magnesium intake.
• If you notice any signs of kidney problems (e.g., reduced urination, swelling, or back pain), consult your doctor immediately.