meperidine vs tramadol
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of meperidine and tramadol. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Examples: Selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), triptans, 5-HT3 receptor antagonists, drugs that effect the serotonin neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), certain muscle relaxants (i.e., cyclobenzaprine, metaxalone), monoamine oxidase inhibitors (MAOIs) (those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue).
Demerol
Ultram, ConZip
Meperidine is a strong pain medicine. It is used to treat severe, acute pain when other pain medicines are not strong enough.
Tramadol extended-release is a strong pain medicine. It is used to treat severe, ongoing pain that needs an opioid medicine when other pain medicines don't work well enough.
Meperidine is used to manage acute pain that is severe enough to need an opioid pain medicine. It is for use when other treatments do not work well enough. Meperidine should not be used for chronic, long-lasting pain. Taking meperidine for a long time may increase the risk of seizures.
Tramadol extended-release tablets are used to manage severe, long-lasting pain. This medicine is for pain that requires an opioid and cannot be treated well with other options. It is not for pain that comes and goes.
Meperidine is an opioid agonist. It works by binding to receptors in the brain and spinal cord. This reduces the feeling of pain.
Tramadol works in your brain to change how your body feels pain. It binds to opioid receptors and also affects certain chemicals in the brain. This helps to lessen the pain you feel.
- • Lightheadedness
- • Dizziness
- • Sleepiness
- • Nausea
- • Vomiting
- • Dizziness
- • Constipation
- • Feeling sick to your stomach
- • Headache
- • Feeling sleepy
- Drug Hypersensitivity 3,249
- Pain 1,248
- Nausea 1,132
- Hyperhidrosis 821
- Rash 775
- Dependence 7,820
- Overdose 3,855
- Vomiting 3,155
- Pain 2,876
- Nausea 2,712
Meperidine has a boxed warning. This means it has serious risks. These risks include: Medication errors that can cause overdose, addiction, abuse, and misuse, life-threatening respiratory depression, accidental ingestion (especially by children) can cause a fatal overdose, dangerous effects when taken with benzodiazepines or other CNS depressants, and neonatal opioid withdrawal syndrome. Make sure you read the Medication Guide.
Tramadol extended-release tablets can be habit-forming, leading to addiction, abuse, and misuse, which can result in overdose and death. Taking tramadol with other depressants like alcohol or benzodiazepines can cause very serious side effects, including slowed breathing, coma, and death. Even one dose of tramadol can be fatal, especially in children. Using tramadol for a long time during pregnancy can cause withdrawal symptoms in the newborn.
Taking meperidine for a long time during pregnancy can cause withdrawal symptoms in the newborn. Meperidine is not recommended during or right before labor because it can cause breathing problems in the baby.
Tramadol may harm your unborn baby. Breastfeeding is not recommended while taking this medicine, as it can pass into breast milk and harm your baby.
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How to Read This meperidine vs tramadol Comparison
meperidine is classified in the Opioid Analgesic drug class, while tramadol sits within the Opioid Analgesic class. Because both drugs share the same classification, they are often considered interchangeable in theory, but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, meperidine has 7,225 submissions while tramadol has 20,418. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to these medicines both affect the serotonin system in your brain. using them together increases the risk of a dangerous buildup of serotonin.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for meperidine or tramadol.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.