Related Experiment Video
Updated: Jul 7, 2026
09:38
Determining Pain Detection and Tolerance Thresholds Using an Integrated, Multi-Modal Pain Task Battery
Published on: April 14, 2016
OTC analgesics and drug interactions: clinical implications
A Mark Fendrick1, Deborah E Pan, Grace E Johnson
1Medical Director, Scientific Therapeutics Information, Inc,, 505 Morris Avenue - 3rd Floor, Springfield, NJ 07081 USA. deborahp@stimedinfo.com.
Osteopathic Medicine and Primary Care
|February 9, 2008
Summary
Many patients are unaware that over-the-counter (OTC) analgesics can cause serious adverse effects when combined with other medications. Clinicians must counsel patients on safe OTC analgesic use to prevent dangerous drug interactions.
Area of Science:
- Pharmacology
- Clinical Medicine
- Drug Safety
Background:
- Concurrent medication use presents a significant risk of drug interactions.
- Patients often lack awareness regarding the potential adverse effects of over-the-counter (OTC) analgesics when combined with other common drugs.
- Specific concerns include interactions with anticoagulants, corticosteroids, and antihypertensive agents.
Purpose of the Study:
- To highlight the clinically relevant issue of drug interactions involving OTC analgesics.
- To inform clinicians and patients about the potential dangers of combining OTC analgesics with other medications.
- To emphasize the importance of patient counseling on safe analgesic use.
Main Methods:
- Review of existing literature on OTC analgesic drug interactions.
- Analysis of adverse event data associated with common medication combinations.
- Clinical assessment of risks related to nonsteroidal anti-inflammatory drugs (NSAIDs).
Main Results:
- Nonsteroidal anti-inflammatory drugs (NSAIDs) significantly increase the risk of upper gastrointestinal adverse events, a risk that is dose-dependent.
- Concomitant use of multiple NSAIDs or NSAIDs with other specific medications exacerbates this gastrointestinal risk.
- Certain NSAIDs can diminish aspirin's antiplatelet effects and elevate blood pressure in hypertensive patients.
Conclusions:
- Clinicians must exercise vigilance regarding potential drug interactions when prescribing new medications, especially concerning OTC analgesics.
- Effective patient counseling is crucial for ensuring the appropriate and safe utilization of OTC analgesics.
- Awareness of these interactions is vital for preventing serious adverse health events.
Related Concept Videos
01:25Analgesia and Pain Management
Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
01:20Opioid Analgesics: Morphine and Other Natural Cogeners
Opioids are a class of drugs that mimic endogenous opioid peptides and act on opioid receptors, and help in pain relief. These compounds are classified as natural, synthetic, or semi-synthetic. Natural opioids, like morphine, codeine, and thebaine, are derived from the opium poppy plant (Papaver somniferum or Papaver album) and are termed opiates. Synthetic opioids are artificial, while semi-synthetic opioids combine natural and synthetic compounds. Morphine, a prototypical opioid, possesses a...
01:25Pharmacokinetics: Drug–Drug Interactions
Drug interactions occur when the pharmacological effect of one drug is altered by another substance, either enhancing or diminishing its activity. The drug whose activity is altered is known as the object drug, and the substance causing the alteration is called the agent drug or the precipitant. The net effects of these interactions are mostly undesirable, leading to decreased effectiveness or increased adverse effects. In rare cases, interactions can be beneficial, such as the enhanced...
01:15Opioid Analgesics: Synthetic and Semisynthetic Opioids
Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...
01:30Drug toxicity: Drug–Drug Interaction
Drug–drug interactions can precipitate toxicity through multiple mechanisms. Absorption interactions alter how drugs enter the body, exemplified when ranitidine increases the absorption of basic drugs, while cholestyramine decreases the levels of propranolol. Protein binding interactions occur when drugs share the same binding sites on plasma proteins. Drugs like aspirin and warfarin, when bound in excess, can lead to increased free drug concentrations, enhancing the potential for...
01:30Combined Effects of Drugs: Antagonism
The combined effects of drugs can result in various interactions, of which an important type is antagonism. Antagonism is a mechanism where one drug inhibits or counteracts the effects of another drug. Antagonism can occur through various means, including receptor binding, allosteric modulation, functional interaction, chemical reactions, and pharmacokinetic processes.
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...
The most common type is receptor antagonism, where one drug acts as an antagonist to block the effects of another drug by...