See the DrugPatentWatch profile for Meperidine
What is meperidine (Demerol) and what is it used for?
Meperidine, sold under the brand name Demerol, is an opioid pain medicine used to treat moderate to severe pain. Like other opioids, it works by changing how the brain and body respond to pain signals.
How does Demerol compare with other opioids?
Compared with several other opioid pain medicines, meperidine is less commonly preferred for ongoing pain because its breakdown product can build up in the body, increasing the risk of serious side effects. Clinicians often choose other opioids instead, depending on the situation.
Why is meperidine limited or avoided in some cases?
A key issue is that meperidine is metabolized into a compound called normeperidine. Normeperidine can accumulate, which raises the risk of neurologic side effects such as tremors, confusion, or seizures, especially with repeated dosing or in people with reduced kidney function.
What side effects should people watch for?
Common opioid-related side effects can include drowsiness, dizziness, nausea, constipation, and slowed breathing. Because meperidine can be associated with more neurologic toxicity than some alternatives (due to normeperidine), watching for agitation, unusual confusion, muscle twitching/tremor, or seizures is especially important when meperidine is used.
What are the major safety risks and drug interactions?
Like other opioids, meperidine carries risks of overdose and potentially fatal respiratory depression, especially if combined with other sedating or respiratory-depressing medicines. Mixing opioids with certain antidepressants, sedatives, alcohol, or other central nervous system depressants can increase danger.
What happens with overdose?
Opioid overdose can cause extreme sleepiness, slow or stopped breathing, and loss of consciousness. Emergency treatment is required, typically with an opioid reversal medicine administered by trained responders.
Is there anything special about dosing or duration?
Meperidine is generally not a go-to choice for long-term or repeated dosing. Risk increases when it is taken repeatedly, at higher doses, or by people who clear the drug more slowly (for example, some patients with kidney impairment). A clinician should provide a specific dosing plan and follow-up.
Can patients ask about alternatives?
Yes. If someone is considering Demerol for pain, a clinician may suggest other opioid or non-opioid options depending on the type of pain, other medical conditions (especially kidney disease), and current medications.
Sources
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