Combining Clonazepam and Fentanyl is a major interaction and should generally be avoided without close medical supervision.
Patients may experience severe respiratory depression, leading to hypoxemia, apnea, and potentially respiratory arrest. Profound sedation, somnolence, dizziness, and impaired psychomotor function are common. In severe cases, this interaction can result in coma and death.
Mechanism: Fentanyl, an opioid agonist, primarily acts on mu-opioid receptors in the central nervous system (CNS) to produce analgesia and respiratory depression. Clonazepam, a benzodiazepine, enhances the inhibitory effects of gamma-aminobutyric acid (GABA) at GABA-A receptors. The synergistic CNS depressant effects of both drugs lead to profound respiratory depression, sedation, and hypotension.
Clonazepam vs. Fentanyl
Compare Clonazepam and Fentanyl: mechanism of action, indications, side effects, cost, and which may be right for you.
Quick Comparison
| Category | Clonazepam | Fentanyl |
|---|---|---|
| Drug Class | Benzodiazepines | Opioid Analgesics |
| Rx Status | Rx | Rx |
| Generic Available | No | No |
| Typical Cost | $4–$25/month | $150–$600/month |
Clonazepam Overview
Clonazepam is a medication used to treat certain types of seizure disorders, including Lennox-Gastaut syndrome and absence seizures. It also helps manage panic disorder, which involves unexpected panic attacks. This medication works by calming overactivity in the brain to reduce seizures and anxiety.
Full Clonazepam guide →Fentanyl Overview
FENTANYL (brand name: FENTANYL) is a Opioid Analgesics. 1 INDICATIONS AND USAGE Fentanyl transdermal system is indicated for the management of severe and persistent pain in opioid-tolerant patients, that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Patients considered…
Full Fentanyl guide →How Each Drug Works
Fentanyl
Fentanyl is an opioid agonist. Fentanyl interacts predominately with the opioid mu-receptor. These mu-binding sites are distributed in the human brain, spinal cord, and other tissues.
Approved Uses (Indications)
Clonazepam
INDICATIONS AND USAGE Seizure Disorders: Clonazepam tablets are useful alone or as an adjunct in the treatment of the Lennox- Gastaut syndrome (petit mal variant), akinetic and myoclonic seizures. In patients with absence seizures (petit mal) who have failed to respond to succinimides, clonazepam tablets may be useful. Some loss of effect may occur during the course of clonazepam treatment (see PRECAUTIONS: Loss of Effect ). Panic Disorder: Clonazepam tablets are indicated for the treatment of panic disorder, with or without agoraphobia, as defined in DSM-V. Panic disorder is characterized by …
Fentanyl
Fentanyl transdermal system is indicated for the management of severe and persistent pain in opioid-tolerant patients, that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Patients considered opioid-tolerant are those who are taking, for one week or longer, at least 60 mg morphine per day, 25 mcg transdermal fentanyl per hour, 30 mg oral oxycodone per day, 8 mg oral hydromorphone per day, 25 mg oral oxymorphone per day, 60 mg oral hydrocodone per day, or an equianalgesic dose of another op…
Side Effects
Clonazepam
Fentanyl
Cost Comparison
Clonazepam
$4–$25/month
As a widely available generic, prices for Clonazepam are generally low. Using discount cards like GoodRx can often reduce the cost even further, sometimes as low as $4 per month.
Fentanyl
$150–$600/month
As a brand-only medication, fentanyl can be expensive. Patients should check for manufacturer coupons or patient assistance programs, and compare prices at different pharmacies using discount cards.
Compare prices for Clonazepam and Fentanyl
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Medical Disclaimer
The information on RxGuide is intended for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician, pharmacist, or other qualified health provider with any questions you may have regarding a medical condition or medication. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.