{
  "meta": {
    "disclaimer": "Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated. We may limit or otherwise restrict your access to the API in line with our Terms of Service.",
    "terms": "https://open.fda.gov/terms/",
    "license": "https://open.fda.gov/license/",
    "last_updated": "2026-09-29",
    "results": {
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    {
      "product_ndc": "58657-120",
      "generic_name": "Magnesium Oxide",
      "labeler_name": "Method Pharmaceuticals, LLC",
      "brand_name": "Magnesium Oxide",
      "active_ingredients": [
        {
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      "packaging": [
        {
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          "description": "120 TABLET in 1 BOTTLE (58657-120-12)",
          "marketing_start_date": "20180725",
          "sample": false
        }
      ],
      "listing_expiration_date": "20261231",
      "openfda": {
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      "marketing_category": "OTC MONOGRAPH DRUG",
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      "product_type": "HUMAN OTC DRUG",
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      "product_id": "58657-120_41b54dc8-16af-7ea0-e063-6394a90ad7b2",
      "application_number": "M001",
      "brand_name_base": "Magnesium Oxide",
      "pharm_class": [
        "Calculi Dissolution Agent [EPC]",
        "Increased Large Intestinal Motility [PE]",
        "Inhibition Large Intestine Fluid/Electrolyte Absorption [PE]",
        "Inhibition Small Intestine Fluid/Electrolyte Absorption [PE]",
        "Magnesium Ion Exchange Activity [MoA]",
        "Osmotic Activity [MoA]",
        "Osmotic Laxative [EPC]",
        "Stimulation Large Intestine Fluid/Electrolyte Secretion [PE]"
      ]
    }
  ]
}