Half life of nyquil

DayQuil and NyQuil COMPLETE™ + Vicks VapoCOOL Cold & Flu provide fast and effective, all-in-one cold & flu symptom relief, with a cooling flavour sensation that will ripple through your senses. DayQuil COMPLETE + Vicks VapoCOOL relieves: nasal congestion and pain, chest congestion, cough due to cold, cough with phlegm, sore throat pain ...

The half-life of sleeping pills varies widely by brand and active ingredient. Some sleep medications have short half-lives, like Ambien (3 hours). Others, such as Valium, have half-lives that range between 20 and 80 hours. The half-life of the drug has a direct impact on how fast the substance leaves the body.Dextromethorphan: This substance’s half-life is between 3 to 6 hours. In reality, Dextromethorphan will be eliminated from the system of a healthy adult after about 11 to 33 hours. This substance is contained in all of Nyquil products, except for “Nyquil Sinus”. Phenylephrine: This substance has a half-life of only 2.1 to 3.4 hours ...The elimination half-life of diphenhydramine can vary between age groups. For pediatric patients, the elimination half-life is approximately 5 hours (range: 4 to 7 hours). For adult patients, the elimination half-life is approximately 9 hours (range: 7 to 12 hours) and approximately 13.5 hours (range: 9 to 18 hours) for elderly patients (range ...Common side effects of NyQuil Severe Cold and Flu may include: drowsiness; constipation, diarrhea, upset stomach, vomiting; or. feeling restless or excited. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.The Work Life channel describes issues most of us face on the job. Explore work life issues from the dirtiest jobs to the executive suite. Advertisement The Work Life channel descr...

Half-life: 1.25-3hr. Excretion: Urine. Dextromethorphan. Onset: 15-30 min. Duration: 3-6 hr. Metabolism: Hepatic P450 enzyme CYP2D6. Excretion: Urine. Half-life: 2-4 hr (extensive...Jan 8, 2024 · Adults and children 12 years and older: The typical dose is 30 mL (2 tablespoons) by mouth every 6 hours. Don't take more than 120 mL (8 tablespoons) in a 24-hour period unless your provider specifically told you to do so. Children 4-11 years old: Ask your child's provider. Children 3 years and younger: Don't use. (Vicks Alcohol-Free NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life. ...Pharmacy Pharmacy online online Pharmacy Pharmacy Pharmacy Pharmacy The typical dose for adults is 500mg of amoxicillin every 8 hours, or 875mg every 12 hours for more severe infections. For children, the dosage is determined by their weight and is usually calculated as 20-45mg per kilogram of body weight per day, divided into two or three doses.(Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life.

Answer. NyQuil can be taken every four to six hours, with a maximum of four doses per 24 hours. So, if you took NyQuil to help you fall asleep, and you wake up later in the evening, you can take another dose as long as it has been at least 4 hours since your last dose. In regard to being able to take NyQuil long-term, the drugs contained in it ...One drink is defined as: 2 ounces of regular beer (around 5% alcohol) 5 ounces of wine (around 10-12% alcohol) 1.5 ounces of distilled spirits (about 40% alcohol) So, if you have 'one' drink, you should not consume NyQuil for at least an hour. Similarly, if you consume 'two' drinks, you should not consume NyQuil for at least two hours and so on.Answer. NyQuil can be taken every four to six hours, with a maximum of four doses per 24 hours. So, if you took NyQuil to help you fall asleep, and you wake up later in the evening, you can take another dose as long as it has been at least 4 hours since your last dose. In regard to being able to take NyQuil long-term, the drugs contained in it ...Nyquil’s active ingredient has an elimination half-life of around 10 hours. Here’s the important part that the athlete taking Nyquil 12 days in a row needed to see. That longer half life means that these medications remain …Compare DayQuil/NyQuil Severe Cold And Flu vs Tylenol head-to-head with other drugs for uses, ratings, cost, side effects and interactions. ... Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value. N/A. 2.5 hours. CSA Schedule ** View glossary of terms:

P0171 codigo.

Feb 19, 2024 · NyQuil. If you are only using NyQuil Cold and Flu Nighttime Relief Liquid, it can be taken every 6 hours, but do not exceed 4 doses within 24 hours. If you have taken 4 doses of NyQuil in one day, do not take DayQuil in the same day unless recommended by your healthcare provider. The dose for NyQuil Cold and Flu Nighttime Relief is: Prescribed for Cold Symptoms. DayQuil/NyQuil Severe Cold and Flu may also be used for purposes not listed in this medication guide. Prescription and OTC. Tylenol is an effective mild pain reliever with a low risk of side effects but the potential for liver damage exists, even at recommended dosages. The risk is increased with higher dosages, a ... NyQuil contains 10% alcohol by volume, about the amount in wine. The concern with combining NyQuil and alcohol is more around the drugs contained in the product versus the alcohol content. NyQuil contains acetaminophen, which, like alcohol, is linked to liver injury when both are used in excess. Having a few alcoholic drinks, then taking a ...Short half-life reduces the risk of oversedation. Unlike benzodiazepines, dexmedetomidine may be less likely to perpetuate sedation/delirium. The main side effects of dexmedetomidine are bradycardia and hypotension, which is actually helpful here (because most of these patients are tachycardic and hypertensive to begin with).If we include medical science here, then the half-life span of doxylamine is 10 hours. It means it can stay and dissolve in your body in around 20 hours. All of these …

Yeast Infections: Augmentin can disrupt the natural balance of bacteria in the body, potentially leading to yeast infections, particularly in women. Other Side Effects: Less common side effects may include headache, dizziness, fatigue, and changes in taste sensation. Weekend Round Trip - starts from $276. 2 Night Stay - starts from $176.It is important to not take an additional dose of NyQuil if you are still feeling the sedating effects of the product. However, if the effects of your last dose of NyQuil have worn off, you are safe to take another dose as long as 6 hours have passed since your last dose. Waiting 6 hours between doses will ensure that you do not take more than ...Why is Vicks NyQuil Cold & Flu Nighttime Relief LiquiCaps better than Alka-Seltzer Plus Night Cold? 325mg more paracetamol content? 325mg vs 0mg; ... A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however ...Generally, the active ingredients in common NyQuil products are relatively safe to take. However, liquid forms of NyQuil contain alcohol as an inactive ingredient. Women should avoid consuming ...Doxylamine succinate (antihistamine) Each ingredient has a different duration of action (how long it lasts). How long Nyquil's effects last varies from person to person, …WalletHub selected 2023's best life insurance companies in Nevada based on user reviews. Compare and find the best life insurance of 2023. WalletHub makes it easy to find the best ...Jun 14, 2019 · According to the Vicks website, the alcohol concentration is 10 percent in NyQuil Liquid products 2 ⭐ . That's about the same alcohol content as the average white wine, according to Alcohol.org, a resource maintained by American Addiction Centers, Inc. Keep in mind, though, that a dose of NyQuil is much smaller than the average serving of ... Nyquil is just one of many over-the-counter drugs used to help with cold symptoms. As accessible as Nyquil and other drugs like it is, there is still room for abuse, especially when combined with alcohol. Cold and cough medicines are sometimes abused by teens to get high but combining Nyquil and alcohol can be a dangerous combination.(Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life.A single oral dose of 30mg of DM showed a median half-life of 2.4 hours with an oral bioavailability of 1 to 2%. Approximately 9% of the population are poor metabolizers. After a single dose orally, the median …Your child can take up to four doses of Children’s NyQuil within 24 hours, 15 ml every six hours. If the doctor prescribes it, children under the age of 6 can take Children’s NyQuil if needed; however, it should not be given to children under the age of 4 years old. For children over the age of 12 and for adults, there are two options ...

But doxylamine stays in your system longer. After taking doxylamine, it takes the body roughly 10 hours to clear half the dose (its half-life). For older adults, this time may increase up to 15 hours. For diphenhydramine, it takes the body less time to get rid of half your dose — roughly 3 to 9 hours.

Vicks Nyquil D Cold and Flu Nighttime Relief has an average rating of 8.2 out of 10 from a total of 5 ratings on Drugs.com. 60% of reviewers reported a positive effect, while 0% reported a negative effect. It is important to not take an additional dose of NyQuil if you are still feeling the sedating effects of the product. However, if the effects of your last dose of NyQuil have worn off, you are safe to take another dose as long as 6 hours have passed since your last dose. Waiting 6 hours between doses will ensure that you do not take more than ...Half a bottle of nyquil #13942567 - 02/10/11 10:49 PM (12 years, 10 months ago) Edit : Reply : Quote : Quick Reply: About 30 min ago i drank half a bottle of nyquil, cause i have the flu and feel like shit.The amount of time NyQuil stays in a person’s system is contingent upon its chemical composition. To ascertain the drug’s duration in one’s body, the half-lives of its chemical components come into play. A notable ingredient in Nyquil is Doxylamine Succinate. This compound requires approximately 2.29 days for elimination from the system.(Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life.SKU: 080596004323. $4.95. Qty. $4.95. Edit Remove item. Buy cheap Lisinopril online - Hydrochlorothiazide Tablets for Sale Order Lisinopril (Hydrochlorothiazide) No Prescription Ulcerative actinomycosis usually develops in debilitated patients. The patient have to talk with a doctor if such clinical problems exist as diabetes, heart disease ...Medical Answers. Can you overdose on Nyquil? Medically reviewed by Carmen Pope, BPharm. Last updated on Feb 14, 2024. Official answer. by Drugs.com. …Xash: half-life. Port for html of the cult game "Half-life" and its add-on "Half-life: opposing force". The rights to the game belong in particular to Valve and GearBox software. More information about the series of games "Half-life" can …NyQuil usually triggers sleepiness approximately half an hour after a person takes the medication. Doctors may recommend waiting to take the medication until just before bedtime Trusted Source UpToDate More than 2 million healthcare providers around the world choose UpToDate to help make appropriate care decisions and drive better health outcomes.Vicks NyQuil Cold & Flu Liquid provides fast, powerful relief for your worst cold and flu symptoms. When cold symptoms keep you up, turn to Vicks NyQuil Cold & Flu nighttime relief medicine to help you get the rest you need. When you need fast relief, this powerful, multi-symptom relief medicine treats headache, fever, sore throat, minor aches and …

Maryland judiciary case.

Menards item locator.

Just one dose starts working fast to relieve 9 of your worst cold and flu symptoms. Flavored with real honey, Vicks NyQuil SEVERE Honey provides fast, powerful, maximum strength 9-symptom relief to treat coughing, sneezing, stuffy nose, minor body pain, sinus congestion, sinus pressure, sore throat, headache, and fever. Zoloft (Sertraline) is commonly prescribed for the treatment of various anхiety disorders, including generalized anxiety disorder (GAD), panic disorder, social anxiety disorder, and post-traumatic stress disorder (PTSD). These conditions are characterizеd by eхcessive worry, fear, and distress that can intеrfere with daily life. They found that the vast majority of drugs still had around 70-80% potency after 10 years if stored in the original container! This led to the creation of the FDA Shelf Life Extension Program (SLEP). Going back to expired Nyquil, it most likely is safe in regard to it not causing harmful side effects.Xanax/Nyquil: Excess sedation, disorientation, poor memory, poor coordination, respiratory depression. Contact your doctor ASAP. Created for people with ongoing healthcare needs but benefits everyone. Learn how we can help. 2.8k views Answered >2 years ago.Feb 14, 2012 · POWER THROUGH YOUR WORST COLD & FLU SYMPTOMS: Life doesn’t stop when you have a cold, DayQuil and NyQuil relieve bothersome symptoms, such as cough and fever, day and night ; WORLD'S #1 SELLING OTC COUGH AND COLD BRAND** Vicks has been trusted for over 125 years to relieve your worst cold & flu symptoms One dose of NyQuil is 30mL (one ounce). This yields only about 3 grams of pure alcohol per dose , less than a quarter of what is considered to be 'one standard drink'. Considering that it takes multiple 'standard drinks' for someone to become intoxicated, it stands to reason that you really can't get drunk on NyQuil unless it is misused or abused.They found that the vast majority of drugs still had around 70-80% potency after 10 years if stored in the original container! This led to the creation of the FDA Shelf Life Extension Program (SLEP). Going back to expired Nyquil, it most likely is safe in regard to it not causing harmful side effects.The active ingredients in NyQuil are acetaminophen, dextromethorphan HBr and doxylamine succinate. NyQuil also contains a number of inactive ingredients.I maintain that no one needs to be warned not to eat chicken cooked in cold medicine. Dear Food and Drug Administration: You need to start asking me what things are real and what t...Dextromethorphan has a half-life of 3 to 30 hours. It is metabolized in the liver by the cytochrome p450 system and is mainly excreted by the kidneys. The volume distribution is 5 to 6.7 L/kg. Peak …NyQuil is an over-the-counter medication often used to alleviate symptoms of the common cold and flu. It contains active ingredients that can help with cough, congestion, body aches, and fever. It also contains an antihistamine that can induce drowsiness, thus promoting sleep when your child is unwell. ….

Consider Half-Lives. Medication Half-Life: Understanding Nyquil’s half-life can help you plan the timing effectively, reducing the likelihood of residual effects during surgery. Expert Advice: Seek guidance from your healthcare provider to determine a safe window between Nyquil use and surgery. After Surgery Timing The Effects of a Nyquil Overdose. Overdosing on acetaminophen is one of the most common poisonings in the world. If it's taken in large quantities, the onset of symptoms will first be mild. Often the overdose starts with nausea, stomach pain and sweating. It later progresses to jaundice, intense upper stomach pain and confusion.The odd part is that the clinical effects of the drug last much much shorter than the half life would suggest. They typically only last between 8 and 12 hours. If you are not feeling any of the effects of the Valium any longer, you would probably be safe to take the Nyquil as you wouldn't have to worry about the additive side effect of sedation.Compare DayQuil/NyQuil Severe Cold And Flu vs Tylenol head-to-head with other drugs for uses, ratings, cost, side effects and interactions. ... Half Life The half-life of a drug is the time taken for the plasma concentration of a drug to reduce to half its original value. N/A. 2.5 hours. CSA Schedule ** View glossary of terms: Consider Half-Lives. Medication Half-Life: Understanding Nyquil’s half-life can help you plan the timing effectively, reducing the likelihood of residual effects during surgery. Expert Advice: Seek guidance from your healthcare provider to determine a safe window between Nyquil use and surgery. After Surgery Timing Zoloft (Sertraline) is commonly prescribed for the treatment of various anхiety disorders, including generalized anxiety disorder (GAD), panic disorder, social anxiety disorder, and post-traumatic stress disorder (PTSD). These conditions are characterizеd by eхcessive worry, fear, and distress that can intеrfere with daily life.The half-life period of the drugs NyQuil and DayQuil is about 10 to 12 hours. So, there are chances that false positive results might occur if you take NyQuil or DayQuil. It is better if you avoid NyQuil and DayQuil for a while before your urine drug test.Every year, the flu affects up to 20% of the U.S. population. In the U.S., it’s also estimated that there are more than 1 billion colds every year. Although the cold and flu viruses are different, it’s easy to confuse the two.. The common cold tends to be mild, with typical symptoms of cough, sneezing, and stuffy nose. The fl u is usually more severe, … Half life of nyquil, My Life with OCD is an honest and courageous self-exploration of the triumphs and challenges of living with this condition. Follow Sian Ferguson Living with OCD means having obsess..., Key points. There is no known drug interaction between NyQuil and Mucinex (guaifenesin). They are safe to take together. Hello and thanks for your question! The answer to this one is straightforward, Mucinex (guaifenesin) can be safely taken with Nyquil. There is no listed or reported interaction between the two drugs., A single oral dose of 30mg of DM showed a median half-life of 2.4 hours with an oral bioavailability of 1 to 2%. Approximately 9% of the population are poor metabolizers. After a single dose orally, the median …, Half-Life Elimination. Neonates <7 days (Jager-Roman 1982): Within first week of life, more prolonged than with lower GA: GA 28 to 30 weeks: 75.3 ± 16.9 hours. GA 32 to 35 weeks: 35.4 ± 1.5 hours. GA 36 to 40 weeks: 24.8 ± 1.6 hours. Neonates ≥7 days: ~22.5 hours (Upadhyaya 1988) Children and Adolescents: 6 to 10 hours (Lamp 1999) Adults ..., It’s usually safe to take Mucinex with Nyquil or Dayquil. But you should avoid taking Nyquil or Dayquil with Mucinex DM, since they all contain dextromethorphan. It’s possible to take too much acetaminophen if you combine Tylenol with Nyquil or Dayquil. Talk to your healthcare provider or pharmacist before combining these medications., Your life insurance policy can be used in more ways than you might think. Check out these six non-traditional options to consider. Life insurance is a powerful tool. As with other ..., Half-life is defined as the amount of time it takes a given quantity to decrease to half of its initial value. The term is most commonly used in relation to atoms undergoing radioactive decay, but can be used to describe other types of decay, whether exponential or not. One of the most well-known applications of half-life is carbon-14 dating., The amount of time NyQuil stays in a person’s system is contingent upon its chemical composition. To ascertain the drug’s duration in one’s body, the half-lives of its chemical components come into play. A notable ingredient in Nyquil is Doxylamine Succinate. This compound requires approximately 2.29 days for elimination from the system., Xanax/Nyquil: Excess sedation, disorientation, poor memory, poor coordination, respiratory depression. Contact your doctor ASAP. Created for people with ongoing healthcare needs but benefits everyone. Learn how we can help. 2.8k views Answered >2 years ago., NyQuil usually triggers sleepiness approximately half an hour after a person takes the medication. Doctors may recommend waiting to take the medication until just …, What is Nyquil Cold and Flu used for? Temporarily relieves common cold and flu symptoms, including: Cough. Sore throat. Headache. Minor aches and pains. Fever. …, Nyquil’s Cocktail: Unravel the mix of ingredients and their potential effects on your body. Perfect Timing: The Half-life Factor Here’s a puzzle: how long should you wait between popping Tylenol and Nyquil? It’s all about understanding their half-lives—the time taken for half the drug to leave your system. , Do not give Nyquil more often than every 6 hours and do not give more than 4 doses per day. For NyQuil liquid caps the dosage is: Teenagers aged 12 years or older: 2 capsules every 6 hours if needed; Adults: 2 capsules every 6 hours if needed. Do not give Nyquil liquid caps more often than every 6 hours and do not give more than 4 doses per …, What is Nyquil Cold and Flu? Acetaminophen is a pain reliever and fever reducer.. Dextromethorphan is a cough suppressant. It affects the cough reflex in the brain that triggers coughing. Doxylamine is an antihistamine that reduces the effects of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, …, (Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life., Nyquil is just one of many over-the-counter drugs used to help with cold symptoms. As accessible as Nyquil and other drugs like it is, there is still room for abuse, especially when combined with alcohol. Cold and cough medicines are sometimes abused by teens to get high but combining Nyquil and alcohol can be a dangerous combination., There are two types of life insurance companies in the insurance business today. Some are stock companies, which are publicly traded entities, while others are mutual companies tha..., If you drink that much NyQuil, whether intentionally or not, you should call poison control immediately. They can guide you through whether you need to go to the emergency room or whether you will be OK. Do not ignore this advice. Call immediately. 800-222-1222. , Do not give Nyquil more often than every 6 hours and do not give more than 4 doses per day. For NyQuil liquid caps the dosage is: Teenagers aged 12 years or older: 2 capsules every 6 hours if needed; Adults: 2 capsules every 6 hours if needed. Do not give Nyquil liquid caps more often than every 6 hours and do not give more than 4 doses per day., Number of hours a drug’s residual effects last is best known through half-life of its key chemicals. (1) Dextromethorphan (cough suppressant) has a half-life of about 4 to 5 hours. This chemical may take more than 15 to 30 hours for its complete discharge from your system; (2) Acetaminophen (reducer of fevers) – Its half-life is noted as 2. ..., Of all potential DayQuil ingredients, Guaifenesin has the shortest elimination half-life of ~1 hour, meaning it will be out of your system in less than 6 hours post …, Will taking a half dose of NyQuil make me more likely to be able to wake up at a normal time . Unanswered I’m sick and every time I take NyQuil I sleep for like 15 hours but I need to wake up early tommrow. Is taking a half dose a good way to be able to sleep and actually wake up on time?, Key points. There is no known drug interaction between NyQuil and Mucinex (guaifenesin). They are safe to take together. Hello and thanks for your question! The answer to this one is straightforward, Mucinex (guaifenesin) can be safely taken with Nyquil. There is no listed or reported interaction between the two drugs., Jun 19, 2019 · There are different versions of Nyquil. Some are listed down along with the ingredients in Nyquil. Check them out. 1. Nyquil Flu/Cold Multi-Symptom Relief. The Nyquil Flu/Cold Multi-symptom Relief is a liquid version, which is available in LiquiCap and syrup form. One-half adult dose has: 15 ml / 325 mg Acetaminophen (fever reducer or pain ... , Intoxication from too many NyQuil can result in an overdose that can be life-threatening. Signs of an overdose include: Confusion loss; Breathing slowly; ... How long does it take for NyQuil to wear off? Doxylamine has a half-life of 10 hours, which means it can take your body up to 50 hours (more than 2 days) to completely eliminate it. ..., Fluoxetine, also known as Prozac, is commonly used in the treatment of bulimia nervosa. Bulimia nervosa is an eating disorder characterized by binge-eating episodes followed by behaviors to compensate for the excessive food intake, such as self-induced vomiting or excessive exercise. Fluoxetine is a selective serotonin reuptake inhibitor (SSRI ..., What is Nyquil Cold and Flu? Acetaminophen is a pain reliever and fever reducer.. Dextromethorphan is a cough suppressant. It affects the cough reflex in the brain that triggers coughing. Doxylamine is an antihistamine that reduces the effects of the natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, …, (Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life., Nov 3, 2017 · While the average dose of Nyquil lasts an average of 4-6 hours, doxylamine can have a slightly wider range of effect. Depending on the person, it can last anywhere from 3 to 8 hours, making it an ideal choice as a night time sedative. Any longer, and there would be a high chance of morning grogginess. Below, we list the other common versions of ... , While they may have slight differences, NyQuil and DayQuil also share much in common, notes Daily Med. They both contain the pain relieving agent acetaminophen as well as the cough..., Comparing Benadryl vs DayQuil/NyQuil Severe Cold And Flu. Benadryl (diphenhydramine) DayQuil/NyQuil Severe Cold and Flu (acetaminophen / dextromethorphan / doxylamine / guaifenesin / phenylephrine) Prescription and OTC. Benadryl is an antihistamine that can be used to treat allergic reactions, relieve motion sickness, as a sleep aid, and ... , A rallying cry if I ever heard one. The ladies spend the day ice-skating and laughing together, reminding each other that there is life after their deadbeat husbands. …, (Vicks NyQuil Cold & Flu Nighttime Relief Liquid) A drug’s half-life is the time it takes for half of a given dose to be eliminated from the body or bloodstream, as measured in hours. Drugs with a short half-life take effect quicker, however, they need to be taken more frequently than drugs with a longer half-life.