Top answers from doctors based on your search:
Disclaimer

how long does allergen stay in your system

A 28-year-old female asked:
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
2 hours: Most allergic responses occur within 2 hours although reaction to red meat may not come on until 3-6 hours later. Most allergic responses from food ... Read More
1
1 thank

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month
A 38-year-old male asked:
Dr. Colin Kerr
43 years experience Family Medicine
Immune system: If only we knew. There is a certain evolutionary advantage to forming antibodies against substances that can harm you, but clearly the body at times g ... Read More
1
1 thank
A 56-year-old member asked:
Dr. Paul Carter
29 years experience Allergy and Immunology
None: It is a response that is intended for parasites and that is why it is an abnormal response to other substances that cause allergy symptoms.
1
1 thank
A 37-year-old male asked:
Dr. Justin Greiwe
11 years experience Allergy and Immunology
Not Likely: Allergic rhinitis symptoms include: sneezing, rhinorrhea, nasal obstruction/itching, postnasal drip, cough, irritability, and fatigue. Some patients e ... Read More
A 53-year-old member asked:
Dr. Al Hegab
Dr. Al Hegab answered
39 years experience Allergy and Immunology
12 or 24 hours: allegra-d 12 hours, stays for 12 hours, as well the 24 hours preparation, stays for 24 hours, it's a combo medicine,
A 29-year-old female asked:
Dr. Bruce Jacobs
Specializes in Family Medicine
For several: months after stopping. IIt is stored and slowly released from fat stores in body
A 37-year-old member asked:
Dr. James Gagne
47 years experience Internal Medicine
About 24 hours : Penicillin is an antibiotic with a short half-life, about four hours. If you take 500 mg at noon, 250 mg is still there at 4 pm, 125 mg at 8 pm, 62 mg ... Read More
2
2 thanks
A 40-year-old member asked:
Dr. Erica Bial
Specializes in Pain Management
Half life and more: That depends on that you mean by "your system." the "half life" of morphine (the time it takes once it peaks in the body for half of it to have been m ... Read More
A 26-year-old female asked:
Dr. Vladimir Zuzukin
21 years experience ENT and Head and Neck Surgery
Flonase: Topical nasal steroid sprays like Flonase have near negligible absorption in your system (ie blood). Blood levels of any nasal steroid is far below a ... Read More
1
1 thank
A 44-year-old member asked:
Dr. Ritesh Rathore
29 years experience Hematology and Oncology
Depends: A single standard dose of Adderall (dextroamphetamine and racemic amphetamine) is usually completely eliminated after 1 day; the half life is 10 hours ... Read More
5
5 thanks
A member asked:
Dr. David Rosenfeld
26 years experience Pain Management
See below: The half life is 4.5 hours. Based on that it should be out of your system in 18 hours.
3
3 thanks
A 30-year-old member asked:
Dr. George Valdez
Specializes in Family Medicine
Depends: Depends on size and age of the person, and what else is in the system, but the half life is 3 to 12 hours.
3
3 thanks
A 25-year-old male asked:
Dr. Alan Wartenberg
48 years experience Addiction Medicine
Variable: In general, it is short-acting, with a half-life of about 3 hours, but there may be genetic differences as well as drug/drug and drug/food interaction ... Read More
1
1 thank
A 28-year-old female asked:
Dr. Julia Aharonov
24 years experience Anesthesiology
A long time...: It stays in your body longer than you might think. Half life of caffeine can be anywhere from three to seven hours which means it can stay in your sys ... Read More
2
2 thanks
A 32-year-old male asked:
Dr. Ralph Morgan Lewis
37 years experience Family Medicine
"Spice" is the: Generic name for plant material laced with synthetic cannabinoids. There are currently over 140 synthetic cannabinoids on the market; spice is an unre ... Read More
1
1 thank
A 39-year-old member asked:
Dr. Dan Fisher
26 years experience Internal Medicine
Depends.: Depends on how much you drink. Alcohol is cleared from the body at a rate of about 25 mg/dl per hour. Heavy drinkers may metabolize at a faster rate, ... Read More
A 32-year-old female asked:
Dr. John Rhoades
47 years experience Family Medicine
Below: All traces of heroin are generally gone from a user’s bloodstream within six hours. Additionally, the drug is present in saliva and urine for up to tw ... Read More
A 51-year-old female asked:
Dr. Michael Sokol
Specializes in Internal Medicine
The pharmacological: Effect is 24 hours but the biological effect may easily last 48 hours or rarely longer depending on a variety of factors.
10
10 thanks
A 40-year-old member asked:
Dr. Susan Uhrich
35 years experience Psychiatry
That depends: On how much you have smoked over how long. Count on a month.
1
1 thank
A 44-year-old male asked:
Dr. Edward Smith
53 years experience Neurosurgery
About a day: But effects can linger much longer because Dopamine may be depleted by repeated use, hence the "crash".
3
3 thanks
A 33-year-old male asked:
Dr. Donald Jacobson
39 years experience Psychiatry
Half life is 24 Hours: Multiply the half-life times five and you have the time that the drug is for all intents and purposes out of your system. Therefore in this case it wo ... Read More
A female asked:
Dr. Charles Glassman
35 years experience Internal Medicine
Marijuana in Body: The active ingredient in marijuana is THC. The half-life (meaning how long it takes for 1/2 of it to "disappear") is about 20 hours. It can settle in ... Read More
A 27-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Misinformed?: In your system? A topical medication?
1
1 thank
A 51-year-old member asked:
Dr. David Rosenfeld
26 years experience Pain Management
See below : It depends on the formulation and delivery system but immediate release morphine gas a half time of 2-4 hours. Like all drugs it take 4 half lives to ... Read More
4
4 thanks

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month