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how long does poison ivy take to show up

A 56-year-old member asked:
Dr. Ed Friedlander
43 years experience Pathology
Up to 48 hours: This is actually known to make people fairly sick, and if it happens, you'll know it.
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A 45-year-old member asked:
Dr. John Overholt
25 years experience Allergy and Immunology
Weeks: Poison ivy typically resolves in 2-3 weeks.
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A 49-year-old member asked:
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
A week or more: Until you have continued exposure from contaminated clothing or equipment items, it should heal within a few weeks. The application of a rx cortisone ... Read More
A 44-year-old member asked:
Dr. John Chiu
Dr. John Chiu answered
56 years experience Allergy and Immunology
Cleaning: Poison ivy is not contagious but you may be getting them repeatedly from contaminated clothing and gear. Be sure to use detergents on these items othe ... Read More
A 43-year-old member asked:
Dr. Ryan Phasouk
17 years experience Family Medicine
Duration: Poison oak symptoms can take anywhere from 1-3 weeks to resolve without treatment.
A 39-year-old member asked:
Dr. Lily Hwang
17 years experience Pediatric Allergy and Asthma
4hrs to 3d: From direct exposure usually it starts 4 hrs to 3 days. It will peak between 1-2 weeks and new lesions may appear up to 21 days.
A 42-year-old member asked:
Dr. Steven Machtinger
43 years experience Allergy and Immunology
2-4 weeks: The longer you wait to treat effectively with corticosteroids, the longer it lasts.
A 43-year-old female asked:
Dr. Ryan Phasouk
17 years experience Family Medicine
Can vary: Allergic reactions from taking antibiotics can be an immediate event or can take days to develop. When they take a longer period of time, we call the ... Read More
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A 47-year-old member asked:
Dr. Lee Perry
Dr. Lee Perry answered
16 years experience Allergy and Immunology
Not immediate: The reaction to poison ivy and poison oak is called "delayed hypersensitivity" because it usually takes 48-72 hours for a rash to start after the expo ... Read More
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A 40-year-old member asked:
Dr. Michael Zacharisen
32 years experience Allergy and Immunology
Depends: Hives or urticaria can occur within minutes on skin contact or ingestion of a food allergen, while contact dermatitis from poison ivy or nickel may ta ... Read More
A 41-year-old member asked:
Dr. Reid Blackwelder
36 years experience Family Medicine
Usually a day or so: The chemical in the poison ivy plant that causes the problem in many people usually takes a day or two before it fully erupts. Often, people feel some ... Read More
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A 43-year-old member asked:
Dr. Bac Nguyen
22 years experience Family Medicine
As early as 6 hours: In severe cases of poison ivy/oak/summac, topical steroids may not work too well because of the blistering/fluid which reduces the absorption, so you ... Read More
A 36-year-old female asked:
Dr. Bac Nguyen
22 years experience Family Medicine
How early u started?: For a typical sore outbreak, it lasts 10-14 days w/o treatment. If you start medication at the very early onset (some feels/knows before it comes to t ... Read More
A 33-year-old male asked:
Dr. Susan Rhoads
37 years experience Family Medicine
Depends.: It depends on the strength of the steroid. Usually you may start showing some improvement in 24-36 hours. Avoid fragrances in lotions, soaps, deterge ... Read More
A 49-year-old member asked:
Dr. Andrew Oswari
23 years experience Family Medicine
Half life is 8 hours: Its effectiveness only lasts 6-8 hours usually. It's half life is 8 hours, so it may take up to 72 hours to leave your system completely.
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A 30-year-old male asked:
Dr. Gregory Sysyn
26 years experience Pediatrics
Start with this link: http://www.webmd.com/skin-problems-and-treatments/guide/understanding-poison-ivy-oak-sumac-basics
A 48-year-old member asked:
Dr. Jeffrey Rumbyrt
31 years experience Allergy and Immunology
Qualified response: Prednisone itself is metabolized and 'out of the body' within 24 hours; however, the effects of Prednisone may last for days.
A 32-year-old female asked:
Dr. Clarence Lyons
19 years experience Family Medicine
Urine drug screen: If you are talking about a urine drug screen. This is not tested as a drug of abuse.
A 41-year-old member asked:
Dr. Barbara Stark Baxter
41 years experience Allergy and Immunology
Acute/chronic hives: Hives vary greatly in duration, so we call hives lasting <6 wks acute, and >6 weeks chronic. It depends on the cause. A mild drug reaction may cause h ... Read More
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A 48-year-old member asked:
Dr. Kenneth Joel
36 years experience Anesthesiology
Three to four days: Hydrocodone depends on metabolism by the liver to be broken down to hydromorphone. The cyp 450 pathway in the liver is the enzymatic pathway followed ... Read More
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A 45-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Time: Acute effects are about 3 to 6 hours. But ecstasy is the gift that keeps on giving. After effects of ecstasy can include: disorientation, agitation, ... Read More
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A 38-year-old member asked:
Dr. Heidi Fowler
24 years experience Psychiatry
Poison Ivy Symptoms.: Mild cases can last 5 to 12 days. In severe cases the symptoms may last a month or longer.

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