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Doctor insights on: What Should I Be Taking For This Allergic Reaction To Lobster

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Why would I have an allergic reaction to homemade lobster hours after eating it (approx 5 hours)? This has never happened before.

Why would I have an allergic reaction to homemade lobster hours after eating it (approx 5 hours)? This has never happened before.

Not un usual: An allergic reaction can sometimes be delayed for 4 to 8 hrs after exposure. Would see an allergist to investigate this further. ...Read more

Dr. John Chiu
2,638 Doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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I am allergic to seafood but I can eat tunafish and breaded shrimp can I eat lobster and crab without having an allergic reaction?

I am allergic to seafood but I can eat tunafish and breaded shrimp can I eat lobster and crab without having an allergic reaction?

Difficult to answer: Seafood includes shellfish and fish. Shellfish includes mollusks and crustaceans. You describe being able to eat a sea dwelling fish (tuna) and a crustacean (shrimp). Therefore you are not allergic to seafood. Lobsters and crabs are crustaceans and share the same allergy inducing protein tropomyosin. It does not appear you are allergic to that or you would have had trouble with shrimp. ...Read more

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When I eat lobster, crab, & shrimp my stomach starts to bubble and makes my stomach feel full. So I have to throw up is that an allergic reaction?

When I eat lobster, crab, & shrimp my stomach starts to bubble and makes my stomach feel full. So I have to throw up is that an allergic reaction?

Check with your doc: Blood testing for allergies has become much more accurate. Check with your doc if you should have some screening. ...Read more

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How can seafoods like lobster, crab and squid cause food allergies?

How can seafoods like lobster, crab and squid cause food allergies?

If you are sensitive: If you are sensitive to the proteins in these foods, your body makes antibodies that recognize them and set off an allergic reaction. Most foods have the potential of causing allergies, but a few are more likely and shellfish are among the 8 most common food allergens. ...Read more

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How long after taking a medicine can an allergic reaction occur?

How long after taking a medicine can an allergic reaction occur?

Varies: If severely allergic, symptoms such as itching, hives, or wheezing can start immediately, or may develop 30 minutes to 4 hours after taking it. Milder reactions, such as rash, may not start for several days after starting he medication or, as is often the case with antibiotics, not until the second or third time you take it. ...Read more

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How quickly would I have an allergic reaction to diflucan (fluconazole) after taking it?

How quickly would I have an allergic reaction to diflucan (fluconazole) after taking it?

Allergic reaction: Reactions to medications can take 15 minutes to over 1 week to develop. ...Read more

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My medicine I am taking could it be the allergic reaction from why my chin swollen underneath.?

My medicine I am taking could it be the allergic reaction from why my chin swollen underneath.?

Allergic reaction: You need to be careful with allergic reactions. With allergies they can be itching, red blotches or hives. Severe allergic reactions can make it hard to breathe. If you suspect that it is an allergic reaction then call your doctor, don't wait. ...Read more

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How long does methotrexate stay in your system after you stop taking drug. I am having a allergic reaction to the medicine.

How long does methotrexate stay in your system after you stop taking drug. I am having a allergic reaction to the medicine.

Rapidly leaves: 1/2 life depends on dose 3-10 hours with low dose and 8-15 hours with high dose

We usually say it is out after 5 1/2 lives bt there are tissue effects too - maybe 3 weeks ...Read more

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If I'm having a strong radiating burning sensation after taking medicine, does it mean I'm having an allergic reaction to it?

If I'm having a strong radiating burning sensation after taking medicine, does it mean I'm having an allergic reaction to it?

Intolerance: This is not the usual allergic response but may be a side effects from your medication. Call your doctor to find out if an alternate choice may be better for you ...Read more

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I had a severe allergic reaction to keflex. Can I trust taking other antiobios in the future without being pre-tested? How to know if allergic again?

Many options: Antibiotics are in a number of chemical classes. With a severe reaction to Keflex (also called cefazolin), you should avoid antibiotics in the cephalosporin and probably the penicillin class, as there is a higher chance of cross reactivity. Typically, we will give antibiotics in a different chemical class rather than testing. For you, examples may be clindamycin, Ciprofloxacin or vancomycin. ...Read more

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I have allergic reaction to erythromycin, would I expect a reaction to taking azithromycin?

I have allergic reaction to erythromycin, would I expect a reaction to taking azithromycin?

Low likelihood: While both of these antibiotics are macrolides, erythromycin has a 14 carbon lactone ring and azithromycin has a 15 carbon lactone ring. The likelihood is low for cross reactivity, however, a board certified allergist can provide strategies to assess this. Skin tests may be helpful, yet are not standardized so a graded challenge may be necessary. ...Read more

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What to do if allergic reaction!?

What to do if allergic reaction!?

Allergic Reaction?: Not sure what you mean by allergic reaction. If you are referring to anaphylaxis then epinephrine is the treatment of choice, call 911. Allergic rhinitis is treated with OTC antihistamines, daily intranasal steroid or antihistamine sprays, saline rinses, etc. Allergy shots also an option. Avoidance of triggers is important but see an Allergist first to determine exactly what you are allergic to. ...Read more

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What is causing my allergic reaction?

Why allergists exist: Finding & treating the cause of allergic reactions is the main function of an allergist. A solid understanding of the immune system is required, so that immunology goes hand in hand. Timing, prevalence of various causes, location, description, examination, associated factors, family history and finally testing enables allergists to identify the culprit, if one is present; treatment is pt-centered. ...Read more

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What can an allergic reaction feel like?

What can an allergic reaction feel like?

Depends where: In the skin itchy. In the nose itchy, sneezy, runny & stuffy. In the eye itchy and teary. In the lungs coughing, wheezing, weight on chest. In the digestive tract nausea, vomiting, cramps, diarrhea. ...Read more

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What's an allergic reaction? Is mcs real?

What's an allergic reaction? Is mcs real?

Inflammatory rxn: An allergic reaction is the body's defense against an agent it considers harmful or toxic to the body. Most allergic reactions start with food allergies that are undiagnosed and "rev up" the immune system leading to multiple other reactions to environmental items as in mcs. First firgure out what's wrong with the gut and fix it and the immune system will settle down and others will lessen/go away. ...Read more

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How to know if I have an allergic reaction?

How to know if I have an allergic reaction?

Typical: Allergic reactions often causes itching but the symptoms are greatly organ-dependent.
*Nose- congestion, runny nose, sneezing
*Eyes- itching, redness, tearing
*chest-wheezing, shortness of breath, and coughing.
Other conditions include hives from food, itchy mouth and throat from certain fruits, and rarely anaphylaxis.
Contact skin allergy is yet another but the mechanism is different. ...Read more

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What sort of problem is an allergic reaction?

What sort of problem is an allergic reaction?

Immunologic: An allergic reaction is the body's immunologic response to a substance (typically a protein) that it determines is "foreign." the body's th2 type of t cells interacts with b cells that produce ige antibodies. When ige antibodies that are present on mast cells subsequently encounter the allergen, the mast cell releases histamine and other chemical mediators that lead to the symptoms of allergy. ...Read more

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How to know if I have had an allergic reaction?

How to know if I have had an allergic reaction?

Symptoms: If the allergy is to a food or ingested medication, the typical symptoms are vomiting, diarrhea and rash (hives, itching). If trigger was airborne like pollen or pet dander, then itching (nose, skin, eyes), sneezing, runny nose and cough. Asthma symptoms can be from an allergy. An allergist can assist in identifying is symptoms are from an allergy and determine specifically which allergen. ...Read more

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Is it possible to have an allergic reaction to weed?

Is it possible to have an allergic reaction to weed?

You mean marijuana?: A rule of thumb is that anything that has pharmacologic effects also has side effects and can precipitate allergic reactions. This is obviously more common for certain compounds than for others, but is theoretically possible for any compound. That being said, I've never seen or read about a true allergic reaction to marijuana. ...Read more

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How to tell what I am having an allergic reaction to?

Allergy: If you seek the opinion of an allergist you may be able to elucidate the mystery ...Read more

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How to know if I'm having an allergic reaction to something?

How to know if I'm having an allergic reaction to something?

Discuss: Discuss with a physician or care-giver practiced in recognizing allergic reaction. True immune mediated allergy is often confused with pharmacological side effects from medication or non-allergic food intolerance. Also, there are some typical patterns for rash associated with allergy, but many types of rash that are non-allergic. ...Read more

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Is rosacea an allergic reaction?

Is rosacea an allergic reaction?

No: Rosacea is an inherited condition characterized by extra sensitive skin, flushing, dilated blood vessels, inflammatory bumps that mimic acne, and enlarging bumpy nose. Common triggers are chronic sun exposure, caffeine, alcohol, and increase in core temperature, etc...The inflammatory reaction of rosacea is not histamine driven as it is in an allergic reaction. ...Read more

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Allergic reaction to corned beef?

Beef allergy: Are you allergic to beef or is it simply something in the aging process of the corned beef that you reacted to? Your allergist can test you. ...Read more

Dr. John Chiu
1,044 Doctors shared insights

Allergic Reaction (Definition)

Sensitivities to substances, called allergens, that come into contact with the skin, nose, eyes, respiratory tract, and gastrointestinal tract. They can be inhaled into the ...Read more