gabapentin vs morphine
Side-by-side comparison of gabapentin and morphine. 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
7 DRUG INTERACTIONS Concentrations increased by morphine; may need dose adjustment (5.4, 7.1 ) 7.1 Opioids Respiratory depression and sedation, sometimes resulting in death, have been reported following coadministration of gabapentin with opioids (e.g., morphine, hydrocodone, oxycodone, buprenorphine) [ see Warnings and Precautions (5.7) ]. Morphine When gabapentin is administered with morphine, patients should be observed for signs of CNS depression, such as somnolence, sedation and respiratory depression [see Clinical Pharmacology (12.3) ]. 7.1 Opioids Respiratory depression and...
Recommendation: Your doctor may need to lower your dose and check on you often for signs of being too sleepy.
Neurontin, Gralise
MS Contin, Kadian
Gabapentin is a medicine that can treat nerve pain and seizures. It works by calming overactive nerves in the body.
Morphine is a strong pain medicine. It is used to treat severe pain that needs an opioid medicine when other treatments don't work well enough.
Gabapentin is used to manage nerve pain after shingles in adults. This is called postherpetic neuralgia. It is also used with other medicines to treat partial seizures in adults and children ages 3 and older who have epilepsy.
Morphine is used to manage severe pain in adults and children who weigh at least 110 pounds. It is for pain that requires an opioid medicine. It is used when other pain treatments are not strong enough or cannot be tolerated.
Gabapentin affects how nerves send signals to the brain. It is thought to work by decreasing the activity of overexcited nerve cells. This can reduce pain and prevent seizures.
Morphine works by attaching to receptors in the brain and spinal cord. These receptors are involved in sending pain signals. By binding to these receptors, morphine blocks pain signals and reduces pain.
- • Dizziness
- • Sleepiness
- • Swelling in arms and legs
- • Uncoordinated movements
- • Tiredness
- • Constipation
- • Nausea
- • Feeling sleepy
- • Lightheadedness
- • Dizziness
- Tiredness 24,395
- Feeling sick to your stomach 21,942
- Aches and discomfort 20,748
- Loose or watery stools 17,456
- Pain in your head 17,287
- Pain 5,857
- Feeling sick to your stomach 5,534
- Throwing up 4,333
- Death 4,305
- Feeling tired 4,129
This medicine can cause a severe allergic reaction with fever, rash, and organ problems. Stop taking gabapentin and get medical help right away if you have trouble breathing or swelling of your face, lips, tongue, or throat. Do not drive or operate heavy machinery until you know how gabapentin affects you. Do not stop taking gabapentin suddenly, as this may increase seizures. Gabapentin may cause suicidal thoughts or actions. Watch for changes in mood or behavior. Using gabapentin with opioid medicines can cause very slow breathing, sedation, and death. Children ages 3 to 12 may have new or worsening behavior problems.
Morphine can cause addiction, abuse, and misuse, which can lead to overdose and death. It can also cause life-threatening breathing problems, especially when you start taking it or after a dose increase. Accidental ingestion, especially by children, can cause a fatal overdose. Taking morphine with benzodiazepines or other CNS depressants (including alcohol) can cause severe sedation, breathing problems, coma, and death. If you use morphine for a long time during pregnancy, your baby could have withdrawal symptoms after birth.
Gabapentin may cause harm to an unborn baby based on animal studies. If you are pregnant or plan to become pregnant, talk to your doctor. Gabapentin passes into breast milk. The effects on a nursing baby are not known.
Morphine may harm your unborn baby. Using morphine for a long time during pregnancy can cause withdrawal symptoms in the newborn. Tell your doctor if you are pregnant or plan to become pregnant.
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How to Read This gabapentin vs morphine Comparison
gabapentin is classified in the Anticonvulsant / Nerve Pain Agent drug class, while morphine sits within the Opioid Analgesic class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. 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, gabapentin has 101,828 submissions while morphine has 24,158. 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 morphine can raise the levels of gabapentin in your body, and both drugs can slow down your breathing.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between gabapentin and morphine - always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.