Mediclarum

ATC AAlimentary tract and metabolismWHO

Digestion, stomach, diabetesand nutrition

5 570 medicines · 2 375 active substances · from the FDA National Drug Code Directory

Browse the substances How this group is made

Counted from the register

The group in figures

  • 5 570products listed in the register
  • 52%without prescription (2 912)
  • 1 496combination products — more than one substance

What the group contains

Anatomical main group A of the WHO ATC classification: “Alimentary tract and metabolism”. US records carry no ATC code: a product is here because the FDA pharmacologic class on its record maps to this group — not because of any judgement about who it is for.

930 marketing authorisation holders

  • Calcium Carbonate
  • Metformin Hydrochloride
  • Famotidine
  • Potassium Chloride
  • Omeprazole

Source: FDA National Drug Code Directory, 2026-09-13. Counts computed by Mediclarum from that file.

The most common
substances

CALCIUM CARBONATEMETFORMIN HYDROCHLORIDEPOTASSIUM CHLORIDE419413328

never combined
in one product

Each number is how many products in the register contain that substance.

Active substances in this group

Commonest first, by number of products in the register. Select one to see every product that contains it.

  1. 01Calcium Carbonate320 products320 OTC
  2. 02Metformin Hydrochloride287 productsprescription only
  3. 03Famotidine260 products128 OTC
  4. 04Potassium Chloride214 products15 OTC
  5. 05Omeprazole207 products114 OTC
  6. 06Esomeprazole Magnesium150 products61 OTC
  7. 07Bisacodyl105 products105 OTC
  8. 08Meclizine Hydrochloride105 products64 OTC
  9. 09Lansoprazole97 products37 OTC
  10. 10Bismuth Subsalicylate92 products92 OTC
  11. 11Polyethylene Glycol 335086 products86 OTC
  12. 12Glipizide85 productsprescription only
  13. 13Pantoprazole Sodium80 productsprescription only
  14. 14Sodium Chloride77 products25 OTC
  15. 15Magnesium Hydroxide76 products76 OTC
  16. 16Glimepiride69 productsprescription only
  17. 17Magnesium Sulfate53 products43 OTC
  18. 18Sevelamer Carbonate46 productsprescription only
  19. 19Aluminum Hydroxide, Magnesium Hydroxide, Dimethicone45 products45 OTC
  20. 20Ursodiol44 productsprescription only
  21. 21Tirzepatide42 productsprescription only
  22. 22Glyburide41 productsprescription only
  23. 23Potassium Citrate39 productsprescription only
  24. 24Sodium Bicarbonate39 products34 OTC
  25. 25Sitagliptin and Metformin Hydrochloride37 productsprescription only
  26. 26Pantoprazole35 productsprescription only
  27. 27Magnesium Sulfate Heptahydrate34 products13 OTC
  28. 28Cimetidine33 products9 OTC
  29. 29Dapagliflozin and Metformin Hydrochloride33 productsprescription only
  30. 30Aluminum Hydroxide, Magnesium Hydroxide, Simethicone32 products32 OTC
  31. 31Magnesium Citrate31 products31 OTC
  32. 32Lactulose29 productsprescription only
  33. 33Famotidine, Calcium Carbonate and Magnesium Hydroxide27 products27 OTC
  34. 34Esomeprazole25 products23 OTC
  35. 35Lanthanum Carbonate23 productsprescription only
  36. 36Aspirin, Citric Acid, Sodium Bicarbonate22 products22 OTC
  37. 37Cholestyramine22 productsprescription only
  38. 38Omeprazole Magnesium22 products20 OTC
  39. 39Antacid Tablets21 products21 OTC
  40. 40Dexlansoprazole21 productsprescription only
  41. 41Diphenoxylate Hydrochloride and Atropine Sulfate21 productsprescription only
  42. 42Glipizide and Metformin Hydrochloride21 productsprescription only
  43. 43Rabeprazole Sodium21 productsprescription only
  44. 44Calcium Acetate19 productsprescription only
  45. 45Colesevelam Hydrochloride19 productsprescription only
  46. 46Glyburide and Metformin Hydrochloride19 productsprescription only
  47. 47Kali Sulphuricum19 products19 OTC
  48. 48Omeprazole and Sodium Bicarbonate19 products3 OTC

Showing 48 of 1 184. Browse every substance A–Z

How this group is made

Each product is placed by the ATC code in its national register record (Bulgaria) or by the pharmacologic class the FDA assigned it (United States). Products without either are in no group rather than in a plausible one.

A group is not a diagnosis. Medicines are grouped by the class the regulator gave them. Which one suits you depends on things this page cannot know — ask a pharmacist or doctor.