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A fentanyl high usually comes on within minutes.
How Long Does a Fentanyl High Last?
The strongest effects tend to last about 20 to 30 minutes, and most of the high fades within an hour or two. In fact, this is a much shorter window than heroin or most other opioids. ¹
But even though the high wears off quickly, fentanyl doesn’t leave the body nearly as fast, especially with regular use. ⁸
This gap between how quickly fentanyl wears off and how long it actually stays is a big part of what makes it so hard to stop. And if you’ve found yourself caught in that cycle, know that it isn’t a matter of willpower. Below, we take a closer look.
How Long Does a Fentanyl High Last?
When fentanyl is given by IV in a hospital, it takes effect in about a minute and a half, and its peak effect lasts roughly 20 to 30 minutes. ² On the street, though, how long the high lasts depends a lot on how it’s used:
- Injected: Effects hit within a minute or two and fade quickly.
- Smoked: Effects are felt almost right away and are often short-lived.
- Snorted: The high takes a few minutes longer to kick in than injecting, but it’s still fast.
- Pressed pills: Swallowed pills usually take longer to kick in, and counterfeit pills often contain an unknown amount of fentanyl.
- Prescription patches or lozenges: These are designed to release fentanyl slowly, so their effects last much longer.
How Long Does a Fentanyl High Last by Method?
It’s also important to know that street fentanyl is unpredictable. Two pills or two bags can contain very different amounts, which means no timeline is truly reliable. ³
Why is the Fentanyl High So Short?
Fentanyl is often described as “fast in, fast out.” This is because it’s highly fat-soluble.
This means it slips into the brain very quickly, creating an intense high within minutes. But it then spreads from the brain into the body’s other tissues almost as fast, so the high fades just as quickly. Interestingly, morphine and heroin actually take a little longer to kick in, and their effects tend to last longer. ⁴
On top of this, fentanyl is about 50 to 100 times more potent than morphine. ⁵ So, even a tiny amount can produce a powerful but brief effect.
How a Short High Can Fuel Addiction
When a high wears off quickly, the urge to use again comes back quickly, too. In fact, researchers have found that people tend to use fentanyl more often than heroin because its effects don’t last as long. For some, this means using several times a day.
As time goes on and use continues, it may lead to tolerance, meaning you need more to feel the same effect. ⁶ Physical dependence can follow close behind, and withdrawal symptoms can begin within hours of the last dose. ⁷
Find Lasting Freedom From Fentanyl
Because fentanyl lingers in the body, quitting isn’t always straightforward. For example, starting suboxone too soon after fentanyl use can trigger precipitated withdrawal, a sudden and intense wave of withdrawal symptoms. ⁹ Fear of this experience even leads some individuals to avoid this helpful medication altogether.
With medically supervised detox, a care team can time medications safely, ease withdrawal symptoms, and help you stay as comfortable as possible. ¹⁰ This gives you a stronger, safer start to recovery.
Fentanyl addiction is serious, but it’s also treatable. With the right support, including medication-assisted treatment (MAT) such as suboxone, sublocade, and vivitrol alongside therapy, you can rebuild a healthier life. At Freedom Recovery Centers (FRC), our compassionate and caring team is here to help. Call us today at 804-635-3746 or fill out our online form.
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