Magaldrate (INN) is a common antacid drug that is used for the treatment of duodenal and gastric ulcers, esophagitis from gastroesophageal reflux.
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AHFS/Drugs.com | Micromedex Detailed Consumer Information |
MedlinePlus | a682683 |
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Routes of administration | Oral |
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Pharmacokinetic data | |
Bioavailability | Negligible |
Metabolism | Nil |
Excretion | Fecal and renal |
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ECHA InfoCard | 100.115.465 |
Chemical and physical data | |
Formula | AlMg2(OH)7·H2O |
Molar mass | 212.66 g/mol |
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Magaldrat was first synthesized by the German chemist Gunther Hallmann and patented on February 2, 1960, by Byk Gulden Lomberg Chemische Fabrik (Germany).[1] In 1983, the active substance was registered as the original drug Riopan.[2]
Magaldrate is available in the form of oral suspension or tablets.
Magaldrate is a hydroxymagnesium aluminate complex that is converted rapidly by gastric acid into Mg(OH)2 and Al(OH)3, which are absorbed poorly and thus provide a sustained antacid effect.[3]
Magaldrate may negatively influence drugs like tetracyclines, benzodiazepines, and indomethacin. High doses or prolonged usage may lead to an increment of defecation and a reduction in feces consistence. In some cases it can alter the functionality of the gastrointestinal tract, occasionally provoking constipation or diarrhea.