Liquorice liquid extract
Licorice allergenic extract is used in allergenic testing.
Official documents, adverse reaction reporting, and safety monitoring
Report a side effect
Submit a Yellow Card report to the MHRA
Official medicine documents
Safety monitoring data
Yellow Card reports
The MHRA Yellow Card scheme collects reports of suspected side effects from healthcare professionals and patients. View the Drug Analysis Profile (iDAP) for real-world adverse reaction data.
View Drug Analysis Profile
Browse all Drug Analysis Profiles A–Z
Browse all iDAP reports
Interactive Drug Analysis Profiles for all medicines
Report a side effect
Submit a Yellow Card report to the MHRA
Data from the MHRA Yellow Card scheme. A reported reaction does not necessarily mean the medicine caused it. Contains public sector information licensed under the Open Government Licence v3.0.
EudraVigilance
The European Medicines Agency (EMA) collects suspected adverse reaction reports from across the EU/EEA through the EudraVigilance system. Search for safety data on this medicine.
Search EudraVigilance database
Browse substances A–Z in the European adverse reaction database
About EudraVigilance
Learn about EU pharmacovigilance and safety monitoring
EudraVigilance data is published by the European Medicines Agency (EMA). A suspected adverse reaction is not necessarily caused by the medicine.
4 branded products available
Therapeutically similar medicines
Similarity is based on WHO Anatomical Therapeutic Chemical (ATC) classification and on a factual NHS dm+d therapeutic-grouping code prefix. Source data: NHS dm+d via TRUD (OGL v3.0), WHO ATC/DDD Index.
NHS prescribing volume and spending trends
Check stock at pharmacies and supply information
Pharmacy stock checkers
Search for this medicine at major UK pharmacy chains. These links open the retailer's own website — results depend on their current online catalogue.
Supply & safety information
Official UK regulator monitoring and safety alerts
Pharmacy links redirect to the retailer's own search and do not represent real-time stock levels. Shortage and safety information sourced from MHRA drug safety updates (gov.uk, Crown Copyright under OGL v3.0).
Codes for healthcare professionals and prescribing systems
These codes are used by healthcare IT systems and prescribers to identify this medicine.
NHS UK identifiers
SNOMED CT and dm+d codes from NHS TRUD (Technology Reference data Update Distribution), licensed under the Open Government Licence v3.0. BNF code shown is the factual mapping value distributed by NHS Business Services Authority (NHSBSA) in the dm+d supplementary file under OGL v3.0; it is not affiliated with, nor licensed from, the publishers of the British National Formulary.
Active and completed clinical studies from ClinicalTrials.gov
Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine (NLM), National Institutes of Health (NIH). Data accessed via ClinicalTrials.gov API v2. Trial information is provided for research purposes and does not constitute medical advice.
Academic studies and reviews for this medicine's active substance
Showing the 50 most relevant studies.
Reviews & meta-analyses: 16 · Randomised trials: 3 · 1950–2025
Showing the 50 most relevant studies, sorted by most relevant.
Giulia Pastorino, Laura Cornara, Sónia Soares, et al.
Phytotherapy Research, 2018
- Anti-Bacterial Agents
- Antioxidants
- Antiviral Agents
Charlotte C. J. R. Michielsen, Enrique Almanza‐Aguilera, Elske M. Brouwer‐Brolsma, et al.
Genes & Nutrition, 2018
Xiaoying Wang, Han Zhang, Lili Chen, et al.
Journal of Ethnopharmacology, 2013
- Glycyrrhiza
- Medicine, Chinese Traditional
- Herb-Drug Interactions
Raj JP, Saxena U, Belhekar MN, et al.
2025
- Glycyrrhiza
- Gastroesophageal Reflux
- Plant Extracts
IntroductionLiquorice (Glycyrrhiza glabra) is a traditional herbal remedy with various pharmacological activities mainly used for digestive and respiratory ailments. GutGard® is a flavonoid-rich, deglycyrrhizinated liquorice root extract and is standardized to glabridin (≥3.5% w/w), and others viz., glabrol, eicosanyl caffeate, docosyl caffeate, and total flavonoids (≥10% w/w) with glycyrrhizin (≤3.0% w/w) as glycyrrhizin causes electrolyte imbalance, hypertension, and water retention. Hence, the objective of the current study was to assess the efficacy, safety, and tolerability of GutGard® in managing gastroesophageal reflux (GER)-related symptoms when compared to placebo.MethodsIt was a double-blind, parallel group, randomized, placebo-controlled trial with participants randomized in a 1:1 ratio to either the placebo group or GutGard® group. The duration of the interventions/treatment was for 28 days and the follow-up visits were done at day 7, day 14, day 28, and day 35. A telephonic follow-up was also done on day 21. The primary outcome measures studied was the change in the Gastroesophageal Reflux Disease-Health-Related Quality of Life and the Gastroesophageal Reflux Disease Symptom Assessment Scale.ResultsWe screened a total of n = 296 participants and enrolled n = 200 participants and obtained written, informed consent from them. Participants in the GutGard® group reported a significantly better quality of life at the end of the intervention period (p = 0.014). They also reported earlier resolution of symptoms of GER as against the placebo group, especially the symptoms of heartburn (p = 0.017 on day 14 and p = 0.005 on day 28) and regurgitation (p = 0.025 on day 7, p = 0.029 on day 14, and p = 0.022 on day 28).ConclusionsThe GutGard® group showed better and earlier resolution (within 2 weeks) of symptoms of GER as against the placebo group, especially heartburn and regurgitation.IntroductionLiquorice (Glycyrrhiza glabra) is a traditional herbal remedy with various pharmacological activities mainly used for digestive and respiratory ailments. GutGard® is a flavonoid-rich, deglycyrrhizinated liquorice root extract and is standardized to glabridin (≥3.5% w/w), and others viz., glabrol, eicosanyl caffeate, docosyl caffeate, and total flavonoids (≥10% w/w) with glycyrrhizin (≤3.0% w/w) as glycyrrhizin causes electrolyte imbalance, hypertension, and water retention. Hence, the objective of the current study was to assess the efficacy, safety, and tolerability of GutGard® in managing gastroesophageal reflux (GER)-related symptoms when compared to placebo.MethodsIt was a double-blind, parallel group, randomized, placebo-controlled trial with participants randomized in a 1:1 ratio to either the placebo group or GutGard® group. The duration of the interventions/treatment was for 28 days and the follow-up visits were done at day 7, day 14, day 28, and day 35. A telephonic follow-up was also done on day 21. The primary outcome measures studied was the change in the Gastroesophageal Reflux Disease-Health-Related Quality of Life and the Gastroesophageal Reflux Disease Symptom Assessment Scale.ResultsWe screened a total of n = 296 participants and enrolled n = 200 participants and obtained written, informed consent from them. Participants in the GutGard® group reported a significantly better quality of life at the end of the intervention period (p = 0.014). They also reported earlier resolution of symptoms of GER as against the placebo group, especially the symptoms of heartburn (p = 0.017 on day 14 and p = 0.005 on day 28) and regurgitation (p = 0.025 on day 7, p = 0.029 on day 14, and p = 0.022 on day 28).ConclusionsThe GutGard® group showed better and earlier resolution (within 2 weeks) of symptoms of GER as against the placebo group, especially heartburn and regurgitation.
Abstract licence: CC BY-NC
Preena Sidhu, Swapnil Shankargouda, Avita Rath, et al.
Journal of Ayurveda and Integrative Medicine, 2018
J Cinátl, Birgit Morgenstern, Gabriele Bauer, et al.
The Lancet, 2003
- Antiviral Agents
- Chlorocebus aethiops
- Glycyrrhiza
P Stewart, Rossella Valentino, Andrew Wallace, et al.
The Lancet, 1987
- Glycyrrhiza
- Plants, Medicinal
- Glycyrrhetinic Acid
Cristina Fiore, Michael Eisenhut, Eugenio Ragazzi, et al.
Journal of Ethnopharmacology, 2005
- Europe
- Gastrointestinal Diseases
- Glycyrrhiza
Yan Pan, Li Jun Wu, Zeng Yu
Plant Growth Regulation, 2006
G. R. Fenwick, J. Lutomski, Christine M. Nieman
Food Chemistry, 1990
Sources: aggregated from Europe PMC (EMBL-EBI), OpenAlex, Crossref, PubMed and other open scholarly databases. Retracted articles are excluded. Study information is provided for research purposes and does not constitute medical advice.
Pharmacology and chemical data from DrugBank
Key facts
Drug status
Approved
Major interactions
None known
Half-life
Not available
Mechanism
Not available
Food interactions
None known
Human targets
None mapped
Data: DrugBank · CC BY-NC 4.0
Pharmacokinetics at a glance
Chemical identifiers
CAS, UNII, InChI Key and database cross-references
Show
Chemical identifiers
CAS, UNII, InChI Key and database cross-references
Linked compound data from DrugBank Open Data (CC BY-NC 4.0)
DrugBank citations
If you use DrugBank data in your research, please cite the following publications: