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how long does a high last
December 12, 2018

How Long Does a High Last?

The trouble with using drugs to feel better “just this once” is that “once” rarely proves enough. Long before physical addiction takes hold, the temporary euphoria of a “high” becomes a siren song luring the user back to recapture that experience. And more often than not, time and pleasure of that high is inversely proportional to level of dependence on the drug.

Most people recovering from drug addiction remember their initial experience as pleasurable (although if the drug was smoked, that pleasure was often tainted by coughing and nausea). Typically, the ultimate journey into addiction can be blamed on that first dose being too pleasurable: someone started out fully intending drug use to be a one-time or occasional thing, but the memory of how good it felt to relieve their stress, forget their problems or feel on top of the world kept calling them back whenever life presented new pressures. Eventually the response became so automatic, and their brains so used to the drug, that they needed it not to feel “good” but to feel functional.

Compounding the problem, “good times” tend to be remembered as better than they actually were (memory screens out the negative aspects, which is a problem in avoiding relapse as well as in making the initial decision to quit a drug). Often, early experiences actually are better. Familiarity breeds contempt, and the brain learns to regard once-euphoric experiences as part of daily maintenance: once new enough to induce exceptional pleasure, now “everyday” enough that one feels uncomfortably normal when the drug is taken, uncomfortably deprived when it isn’t. (With real addiction, of course, the deprivation is often worse than uncomfortable.)

This article looks at some common “how long does it take?” questions regarding drugs and addiction.


How long it takes to feel the high typically depends on the method by which the drug is taken:

  • Inhalation or smoking: From a few seconds to 15 minutes. Drugs that enter the body via the lungs rush from there into the bloodstream and on to the brain. Since foreign substances in the lungs take up space normally filled by oxygen, lowered oxygen levels are also a factor in feeling lightheaded or “high.”
  • Injection: From 30 seconds to 20 minutes. Again, putting the drug directly into the bloodstream gets it to the brain quickly.
  • Oral administration (pills, eating or drinking): Around 30–90 minutes, longer for slow-release pills swallowed whole. A drug that enters the body via the digestive system will take the long route into the bloodstream, delaying the onset of full effects.

Exactly how long it takes any individual to start feeling high depends on both physical and psychological factors, from weight to gender to the reaction a person expects to have. (Scientific research has documented that people who expect a strong high will exhibit intoxication symptoms before the drug has a chance to reach their brains, and even after taking something that contains no actual drugs.)


Likewise, the duration of the high, once it starts, is affected by the method of drug use and by psychological factors, as well as by strength of dose, overall physical condition and the user’s level of addiction/tolerance.

The question of “how long does a high last?” is difficult to answer decisively: search five different information sources on the same drug, and you may find five different answers. That’s because, while medical tests can measure how long a drug physically stays in a person’s system, how long a high is felt depends on subjective interpretations of personal experience, which vary widely.

  • As noted above, a felt high may have little actual relation to the level of drug currently in someone’s system.
  • People who have longstanding addictions are likely to feel—and define—a high differently than newer users, which means there are wide variations in the figures that make up an average. Many people who struggle with addiction feel little actual “high” at all: their experience of the drug is defined by relieving pain or remaining functional.
  • Further skewing the number-of-users-to-duration-of-high ratio, many social drinkers, and many people who take potentially addictive drugs according to prescription, experience no felt high because that wasn’t the effect they were looking for.

Still, the following can be taken as typical duration periods for the intoxicating effects of some common drugs:

  • Alcohol: About one hour per drink, although many people who take one or two drinks with a meal feel little intoxicating effect. A person who drinks to the point of impairment may take 8–12 hours to regain full cognitive and motor function.
  • Benzodiazepines: Effects (which may not include a “high” if the drug is taken according to prescription) last about 1–6 hours, depending on whether a short-acting or long-acting benzo formula is used.
  • Cocaine: Anywhere from five minutes to two hours, depending on size of dose and method of administration. Perhaps because it is rarely taken orally, cocaine has a reputation for producing particularly intense but short-lived effects. This often leads to it being used in “binges”—several doses in rapid succession, often with each dose larger than the last—in attempts to prolong the euphoria.   
  • Methamphetamine: 8–24 hours, depending on method of administration (“meth” is typically smoked, swallowed or injected) and how much was taken. Often, though, the actual “felt high” is much shorter, leading users to take more of the drug before any of the original dose passes out of their bodies.
  • Opiates: Release times for prescription pills vary, and pills taken according to prescription rarely cause discernible “high” feelings. With illegal opiates such as heroin (and with prescription opiate pills crushed for a more intense effect), the high can last anywhere from 15 minutes to four hours.


Some people use drugs regularly for years without ever becoming dependent or addicted. Others are well on their way down the slippery slope within a month of their first taste.

Factors that affect how long it takes to become addicted include:

  • Genetic predisposition
  • Mental health problems, especially depression or anxiety
  • General physical condition, including age-related changes (people under 25 often have still-developing brains that may be permanently impaired by drug use, and longtime social drinkers should start watching for new reactions to alcohol once they reach their late forties)
  • Frequency and amount of drug doses, also the method and intensity at which drugs are taken
  • Composition (“purity”) of the drug

No matter how long someone has taken a drug, key red flags indicating growing dependence are:

  • Taking more of a drug than is recommended by a prescription or doctor
  • Resorting to illicit means of obtaining drugs: stealing, buying on the black market, requesting new prescriptions from doctors who don’t know about the old ones
  • Feeling sluggish, irritable or defensive on a regular basis
  • Needing larger doses than before to get the same high (or getting a high from doses that never caused problems before)


The question of “how long does a drug stay in your system?” is open to almost as many answers as the question of how long a high lasts.

  • If defined as the length of time it takes the obvious “high” and the felt aftereffects (such as a hangover) to wear off: anywhere from one to 24 hours.
  • If defined as how long a drug can be detected by official “drug tests”: usually around 2–3 days, although there are many variables. Evidence of some one-time or occasional uses vanishes within hours. Addiction or chronic use may remain detectable for six weeks or more. And with a hair-follicle test (as opposed to a blood, urine or saliva test), traces may linger as long as 90 days.
  • If defined as how long it takes to physically “withdraw” from addiction: 5–14 days, with the worst symptoms peaking about halfway through. Exact times vary according to a person’s physical condition, type of drug, duration of addiction and whether medication-assisted treatment (MAT) is used.
  • If defined as how long it takes to be weaned from psychological and emotional dependence: around three months with professional support and therapy.

However, periodic cravings for the drug may return for months or even decades, especially if a person is prone to favorable reminiscing about “highs.” This is why:


In one sense, a “high” can last for life, if “high” is defined as physical addiction with inclinations to seek easy stress relief and to react to new doses in old ways. It is never safe to take “just one” dose of a drug that formerly drove an addiction, and often not safe to take any potentially addictive drug at all.

A therapist or doctor can advise you on your own risk areas and how to minimize exposure to them. Stay active in sobriety support groups. Plan in advance how you will deal with any relapse temptations that surface. The pull of the old-time high may never go away completely, but with commitment and diligence, you can find healthier ways to maximize good feelings for the rest of your life.


Alcohol, Drug Addiction & Mental Health Services Board of Cuyahoga County (OH). “Facts About Methamphetamine.” Retrieved from

American Lung Association (2015, March 23). “Marijuana and Lung Health.” Retrieved from

Bartolone, Pauline (2017, November 30). “Rare and Mysterious Vomiting Illness Linked to Heavy Marijuana Use.” NPR, Morning Edition. Retrieved from

Ford, Martin (2017, December 17). “How Long Should You Wait Before Driving After Drinking Alcohol?” Hertfordshire Mercury. Retrieved from “How Long Dos Alcohol Stay in Your Body?” Retrieved from

Marrinan, S., A. Roman-Urrestarazu, D. Naughton, E. Levari, J. Collins, R. Chilcott, G. Bersani, and O. Corazza (2017, May). “Hair Analysis for the Detection of Drug Use: Is There Potential for Evasion?” Human Psychopharmacology, No. 32, p. 3. Retrieved from

Parker-Pope, Tara (2010, August 11). “Why Getting Old Means Drinking Less.” New York Times. Retrieved from

Samaha, Anne-Noel (2015, September 2). “Snorted, Injected or Smoked? It Can Affect a Drug’s Addictiveness.” Retrieved from (2014, July 10). “A Guide to Cocaine.” Retrieved from

University of Michigan Health System (2008, August 9). “If Your First Cigarette Gave You a Buzz and You Now Smoke, A Gene May Be to Blame.” ScienceDaily. Retrieved from

University of Utah, Genetic Science Learning Center. “Drug Delivery Methods.” Retrieved from

U.S. Department of Health & Human Services (2017, May 16). “Facts About Aging and Alcohol.” National Institutes of Health, National Institute on Aging. Retrieved from

For related information on drug effects and addiction, see the following articles:

The Connection Between Alcohol and Anxiety

Do I Need Methadone Rehab?

Happiness After Addiction

What Fentanyl Abuse Does to Your Brain

What Makes Benzos So Addictive?