Official documents, adverse reaction reporting, and safety monitoring
Report a side effect
Submit a Yellow Card report to the MHRA
Official medicine documents
Yellow Card
Report side effects (MHRA)
Drug safety updates
MHRA alerts for Paracetamol + Caffeine
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.
1 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
Guidelines from the National Institute for Health and Care Excellence
NICE clinical guidance(1)
Source: National Institute for Health and Care Excellence (NICE). Contains public sector information licensed under the Open Government Licence v3.0.
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
Browse tools
SNOMED CT and dm+d codes from NHS TRUD (Technology Reference data Update Distribution), licensed under the Open Government Licence v3.0. ATC codes from the WHO Collaborating Centre for Drug Statistics Methodology (whocc.no).
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: 9 · Randomised trials: 6 · 1965–2026
Showing the 50 most relevant studies, sorted by most relevant.
Dobrek L
2025
- Energy Drinks
- Taurine
- Caffeine
Background: Energy drinks (EDs) are non-alcoholic, functional beverages sold worldwide in more than 165 countries. These products are very popular and often consumed by children, teenagers, and young adults to improve physical performance, reduce drowsiness, and improve memory and concentration with increased intellectual effort. However, their consumption is associated with an increased risk of various health consequences. Objectives: The purpose of this non-systematic review was to discuss the components of EDs and their effects, summarize the AEs reported in the literature associated with the consumption of EDs, and briefly characterize the possible ED-related drug interactions. Methods: Scientific evidence was extracted by searching the databases PubMed and Google Scholar. In addition, the reference lists of the retrieved papers were reviewed and cross-referenced to reveal additional relevant scientific evidence. Results: The most common ingredients in EDs are caffeine, taurine, glucuronolactone, B vitamins, the vitamin-like compound inositol, and sweeteners (sugar, fructose, glucose-fructose syrup or artificial sweeteners). Although it is difficult to conclusively prove a cause-and-effect relationship between the consumption of EDs and the observed pathophysiological abnormalities, most scientific evidence (mostly clinical case reports) indicates that both occasional and especially chronic use of EDs is associated with the occurrence of numerous adverse effects (AEs). Among these, the best documented AEs are those on the cardiovascular system. It should also be noted that the components of EDs (primarily caffeine) may have drug interactions; therefore, EDs may be an important factor influencing the safety of pharmacotherapy in patients consuming EDs. Conclusions: Consuming energy drinks lead to various health problems and may interfere with pharmacotherapy due to the potential development of drug interactions. Due to the widespread availability of EDs, their suggestive advertising aimed at the youngest customers, and ambiguous regulations, new legislative policies are required to limit the widespread consumption of such products and their negative health effects.
Abstract licence: CC BY
Elancheziyan Mari, M. Duraisamy, M. Eswaran, et al.
Microchimica Acta, 2024
Amer M. Owayda, M. Y. Hajeer, R. Al-Sabbagh, et al.
Scientific Reports, 2025
- Pain
- Acetaminophen
- Pain Management
Sahar Achek, Marwa Toumia, Randa Dhaoui, et al.
British Journal of Pain, 2025
Yassir YA, Hussein AM, Al Tuma RR
2026
BackgroundOrthodontic pain results from local inflammation and is usually treated with analgesics; however, the effectiveness of acupressure as a nonpharmacological alternative remains uncertain.ObjectivesTo compare the effectiveness of acupressure and paracetamol at relieving pain perception in patients undergoing orthodontic tooth movement.MethodsPatients aged 12 years or older undergoing fixed orthodontic treatment were randomly assigned to two parallel groups (paracetamol or acupressure) using simple non-stratified randomization with an allocation ratio of 1:1. Pain intensity was assessed twice daily using a visual analog scale ranging from 0 to 10 for five days following bonding. Pain scores were compared between groups using the Mann-Whitney U test, and differences in analgesic usage were assessed with the Chi-square test (p ResultsIn total, 61 participants were analyzed. Overall pain perception did not differ significantly between groups (p > 0.05). Analgesic use was higher in the paracetamol group on day two, but only significantly different at the evening time point (p = 0.012). Analgesic usage declined in both groups over subsequent days and no further significant differences were observed. Acupressure application peaked on day two and then decreased steadily through day five. No adverse effects were reported in either group.ConclusionsAcupressure appeared to reduce reliance on medication during the peak initial orthodontic pain period, suggesting its potential use as a conservative alternative for short-term pain management.
Abstract licence: CC BY-NC-ND
Park JH, Lee DW, Kim EJ, et al.
2025
Background/Objectives: Although patients with breast cancer often undergo multiple oncologic procedures after primary tumor resection, an optimal postoperative analgesic strategy remains undefined. We evaluated the efficacy of acetaminophen/ibuprofen as an adjunct to opioid-based patient-controlled analgesia (PCA) following oncoplastic breast surgery. Methods: In this double-blind randomized controlled trial, 79 patients were assigned to receive either acetaminophen/ibuprofen or saline. A 100 mL solution containing 1000 mg acetaminophen and 300 mg ibuprofen was administered at the end of surgery, and 200 mL was incorporated into a fentanyl-based PCA for infusion over 48 h. The control group received an equivalent volume of saline. The primary outcome was pain intensity at 1 h postoperatively, assessed using an 11-point numerical rating scale. Secondary outcomes included pain scores at 6, 24, and 48 h, cumulative fentanyl consumption via PCA, additional analgesic use, and adverse effects. Results: Pain scores at 1 h postoperatively were significantly lower in the intervention group than in the control group (median [IQR], 2 [2, 2] vs. 2 [2, 3], p = 0.040). Cumulative fentanyl volume administered via PCA was lower in the intervention group at 24 h (252.4 [186.7, 289.9] mcg vs. 299.7 [208.3, 366.6] mcg, p p = 0.001). Fewer patients in the intervention group required rescue analgesics during the first 6 h (22 [56.4%] vs. 32 [80.0%], p = 0.024). Pain scores and rescue analgesic use thereafter did not differ between groups. Conclusions: Adjunctive acetaminophen/ibuprofen with opioid-based PCA reduced early postoperative pain, opioid consumption, and rescue analgesia without increasing adverse effects.
Abstract licence: CC BY
T. Kiersch, Milošr. Minić
Current Medical Research and Opinion, 2002
Amer M. Owayda, M. Y. Hajeer, R. Murad, et al.
Journal of the World federation of orthodontists, 2022
- Malocclusion, Angle Class I
- Low-Level Light Therapy
- Pain
J. Franeta, D. Agbaba, S. Erić, et al.
Farmaco, 2002
U. Illangakoon, H. Gill, G. Shearman, et al.
International journal of pharmaceutics, 2014
- Drug Delivery Systems
- Acetaminophen
- Caffeine
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.
Scientific data (pharmacology, interactions, ADME) is not yet available for this medicine. Clinical sections are sourced from the NHS dm+d database.