nalbuphine vs phenelzine
Side-by-side comparison of nalbuphine and phenelzine. 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
Monoamine Oxidase Inhibitors (MAOIs) MAOI (e.g., phenelzine, tranylcypromine, linezolid) interactions with opioids may manifest as serotonin syndrome [see Drug Interactions ] or opioid toxicity (e.g., respiratory depression, coma [see WARNINGS ]).
Recommendation: Use this combination with extreme caution. Your doctor will need to watch you closely for signs of breathing trouble or confusion.
Nubain
Nardil
Nalbuphine injection is a strong pain medicine. It is used when other pain treatments don't work well enough.
Phenelzine (Nardil) is a medicine used to treat depression. It belongs to a class of drugs called MAO inhibitors.
Nalbuphine injection is used to manage severe pain that requires a strong opioid medicine. It can also be used before and after surgery to help with pain. It can also be used during labor and delivery for pain relief.
This medicine treats depression, especially when it involves anxiety, phobias, or hypochondria. It is often used when other antidepressants haven't worked. It may not be as effective for severe depression with 'endogenous' features.
Nalbuphine works by attaching to opioid receptors in the brain and spinal cord. These receptors help to block pain signals. Nalbuphine both activates and blocks opioid receptors.
Phenelzine works by blocking an enzyme called monoamine oxidase (MAO) in your body. MAO breaks down certain chemicals in the brain, like serotonin and norepinephrine. By blocking MAO, phenelzine helps increase the levels of these chemicals, which can improve mood.
- • Feeling sleepy
- • Sweaty or clammy skin
- • Nausea
- • Vomiting
- • Dizziness
- • Dizziness
- • Headache
- • Drowsiness
- • Trouble sleeping
- • Tiredness
- Allergic reaction to the medicine 36
- Baby exposed to the medicine during pregnancy 10
- Newborn has trouble breathing 10
- Newborn has a seizure 10
- Pain 7
- Feeling sad or hopeless 187
- Head pain 136
- Feeling worried or nervous 129
- Gaining weight 120
- Trouble sleeping 104
Nalbuphine can cause serious breathing problems that can be life-threatening, especially when you first start taking it or after a dose increase. Taking nalbuphine with benzodiazepines (like anxiety or sleep medicines) or other drugs that can make you sleepy, including alcohol, can cause very serious sleepiness, breathing problems, coma, and death.
Antidepressants may increase the risk of suicidal thoughts and behavior in children, teens, and young adults. Your doctor will monitor you closely for worsening depression, suicidal thoughts, or unusual changes in behavior. Families and caregivers should also watch for these changes and report them to the doctor. This medicine is not approved for use in children.
Using nalbuphine during pregnancy may cause breathing problems in the newborn. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if nalbuphine passes into breast milk. Talk to your doctor about the risks and benefits of breastfeeding.
It is not known if phenelzine can harm an unborn baby. Talk to your doctor if you are pregnant, planning to become pregnant, or breastfeeding.
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How to Read This nalbuphine vs phenelzine Comparison
nalbuphine is classified in the Opioid Agonist-Antagonist drug class, while phenelzine sits within the Monoamine Oxidase Inhibitor (MAOI) 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, nalbuphine has 73 submissions while phenelzine has 676. 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 combining these drugs can cause serotonin levels to become dangerously high or make the opioid effects much stronger. this can lead to serious breathing problems or a condition called serotonin syndrome.. 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 nalbuphine and phenelzine - 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.