Definition of antacid in English:



  • (chiefly of a medicine) preventing or correcting acidity, especially in the stomach.

    ‘I prescribed a kaolin antacid mixture’
    ‘these drugs have an antacid and analgesic effect’
    • ‘This effect, called effervescence, is found in many commercial antacid products which use sodium carbonate as an active ingredient.’
    • ‘The Pharmacy stocks a number of antacid preparations.’
    • ‘Doctors gave him a variety of medication including antacid tablets for suspected indigestion and over-the-counter painkillers.’
    • ‘Examples of antacid brands include Rennies and Gaviscon.’
    • ‘Of course over-the-counter antacid pills (cimtidine and ranitidine) are available, but I really prefer to avoid possible side-effects they may cause.’


  • An antacid medicine.

    • ‘If antacids don't work, or if large quantities of antacid are needed to be effective, a pharmacist may recommend a more powerful medication.’
    • ‘For example, antacids, antibiotics, and oral contraceptives alter your body's absorption of several B vitamins.’
    • ‘This medicine contains antacids that can keep other medicines from working properly if the 2 medicines are taken too close together.’
    • ‘These familiar antacids were medicine chest staples.’
    • ‘Acidity may cause mouth ulcers and it is easily diagnosed and treated with antacids.’