A Randomized, controlled, crossover trial to investigate times to onset of the perception of soothing and cooling by over-the-counter heartburn treatments

J Int Med Res. 2010 Mar-Apr;38(2):449-57. doi: 10.1177/147323001003800208.


This was a randomized, controlled, four-way crossover study in 45 subjects with a tendency to suffer from moderate heartburn following some meals. The study was designed to assess the time to onset of the perceived soothing and cooling effects of the alginate raft-forming products, Gaviscon Liquid (peppermint), Gaviscon Double Action Liquid (peppermint) and Gaviscon Powder Formulation (fresh tropical), compared with a non-active sublingual control. All three Gaviscon products provided significantly faster soothing and cooling effects compared with the control. Based on the upper 95% confidence limits for the median, time to onset of soothing was perceived within 3.15 min, 3.08 min and 4.05 min for Gaviscon Liquid, Double Action Liquid and Powder Formulation, respectively. Similarly, time to onset of cooling was perceived within 1.95 min, 1.23 min and 11.22 min for Gaviscon Liquid, Double Action Liquid and Powder Formulation, respectively. The results show that Gaviscon Liquid and Gaviscon Double Action soothe within 3.15 min and cool within 1.95 min.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Oral
  • Adolescent
  • Adult
  • Aged
  • Alginates / therapeutic use*
  • Aluminum Hydroxide / therapeutic use*
  • Antacids / therapeutic use*
  • Cross-Over Studies
  • Drug Combinations
  • Female
  • Heartburn / drug therapy*
  • Humans
  • Male
  • Middle Aged
  • Nonprescription Drugs
  • Perception
  • Silicic Acid / therapeutic use*
  • Sodium Bicarbonate / therapeutic use*
  • Suspensions
  • Time Factors
  • Treatment Outcome
  • Young Adult


  • Alginates
  • Antacids
  • Drug Combinations
  • Nonprescription Drugs
  • Suspensions
  • Silicic Acid
  • Aluminum Hydroxide
  • alginate, aluminium hydroxide, magnesium trisilicate, sodium bicarbonate drug combination
  • Sodium Bicarbonate