Related Experiment Video
Updated: Aug 9, 2026

07:23
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities
Published on: July 29, 2014
Clinical evaluation of mild analgesics
British Journal of Clinical Pharmacology
|October 1, 1980
Summary
Evaluating mild analgesics presents challenges due to patient recruitment and drug administration methods. However, pain severity and relief can be quantified using pain scores or visual analogues, with observer input enhancing data.
Area of Science:
- Pharmacology
- Clinical Trials
- Pain Management
Background:
- Evaluating mild analgesics is complex due to patient selection, oral administration, and long-term usage challenges.
- Quantifying pain and relief is feasible using pain scores or visual analogue scales, despite inherent limitations.
Purpose of the Study:
- To outline the specific challenges and methodologies for evaluating mild analgesic drugs.
- To highlight the importance of patient selection and pain assessment techniques in clinical trials for mild analgesics.
Main Methods:
- Utilizing pain scores and visual analogue scales for quantifying pain severity and relief.
- Incorporating trained observer input to supplement patient-reported pain data.
- Discussing the limitations of crossover studies and sequential methods for mild analgesics.
Main Results:
- Pain severity and relief can be objectively measured, though challenges in patient recruitment and study design persist.
- Observer input provides valuable data complementing patient assessments.
- Crossover and sequential methods present unique difficulties when evaluating mild analgesics compared to potent drugs.
Conclusions:
- Effective evaluation of mild analgesics requires careful consideration of patient populations, pain assessment tools, and study designs.
- Long-term side effects are a critical factor in the overall assessment of mild analgesics.
- Access to substantial patient cohorts with defined pain durations is essential for reliable drug evaluation.
Related Concept Videos
Analgesia 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...
Opioid 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...
Opioid 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...

