Lookal 40 Number 581

Lookal 40 Number 581

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Questions & Answers

Side Effects & Adverse Reactions

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Legal Issues

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FDA Safety Alerts

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Manufacturer Warnings

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FDA Labeling Changes

There are currently no FDA labeling changes available for this drug.


Cimetidine tablets are indicated in:

  1. Short-term treatment of active duodenal ulcer. Most patients heal within 4 weeks and there is rarely reason to use cimetidine at full dosage for longer than 6 to 8 weeks (see DOSAGE AND ADMINISTRATION, Duodenal Ulcer). Concomitant antacids should be given as needed for relief of pain. However, simultaneous administration of oral cimetidine and antacids is not recommended, since antacids have been reported to interfere with the absorption of oral cimetidine.
  2. Maintenance therapy for duodenal ulcer patients at reduced dosage after healing of active ulcer. Patients have been maintained on continued treatment with cimetidine 400 mg at bedtime for periods of up to five years.
  3. Short-term treatment of active benign gastric ulcer. There is no information concerning usefulness of treatment periods of longer than 8 weeks.
  4. Erosive gastroesophageal reflux disease (GERD). Erosive esophagitis diagnosed by endoscopy. Treatment is indicated for 12 weeks for healing of lesions and control of symptoms. The use of cimetidine beyond 12 weeks has not been established [see DOSAGE AND ADMINISTRATION, Erosive Gastroesophageal Reflux ( GERD)].
  5. The treatment of pathological hypersecretory conditions (i.e., Zollinger-Ellison Syndrome, systemic mastocytosis, multiple endocrine adenomas).


There is currently no drug history available for this drug.

Other Information

Cimetidine is a histamine H 2-receptor antagonist. Chemically it is N”-cyano- N-methyl- N’-[2-[[(5-methyl-1 H-imidazol-4-yl)methyl]thio]-ethyl], guanidine.

The molecular formula for cimetidine is C 10H 16N 6S; and the molecular weight is 252.35. The structural formula for cimetidine is:


Cimetidine contains an imidazole ring, and is chemically related to histamine. Cimetidine has a bitter taste and characteristic odor.

Solubility Characteristics

Cimetidine is soluble in alcohol, slightly soluble in water, very slightly soluble in chloroform and insoluble in ether.

Each tablet, for oral administration, contains 300 mg, 400 mg, or 800 mg cimetidine. In addition, each tablet contains the following inactive ingredients: corn starch, magnesium stearate, microcrystalline cellulose, povidone, sodium lauryl sulfate and sodium starch glycolate. The coating for the tablets contains: carnauba wax, hypromellose, polyethylene glycol, polysorbate 80, talc, titanium dioxide, and triethyl citrate. The coating for the 300 mg and 400 mg tablets also contains D&C Yellow No. 10 Aluminum Lake, FD&C Blue No. 1 Aluminum Lake, and FD&C Yellow No. 6 Aluminum Lake.

Lookal 40 Number 581 Manufacturers

  • Paramesh Banerji Life Sciences Llc
    Lookal 40 Number 581 (Bryonia Alba, Carbo Vegetabilis) Pellet [Paramesh Banerji Life Sciences Llc]

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