If you happen to’ve just lately tried weed for the primary time anticipating medicinal reduction however as a substitute discovered your self swelling, sneezing, or rubbing itchy eyes, you could have a weed allergy. 


The signs of a cannabis allergy are much like the seasonal allergic reactions and embody the next: 

  • runny nostril 
  • sneezing 
  • itching 
  • swelling
  • watery eyes
  • rashes
  • hives 

In extreme circumstances, anaphylaxis can develop. This acute allergic response to cannabis most usually happens after the ingestion of hemp seeds. So what precisely is anaphylaxis? It can lead to swelling of the throat, issue respiratory, and passing out.

If not handled instantly, anaphylaxis might be deadly. If you happen to suspect that you could have an allergy to cannabis, discuss to your physician about carrying an epinephrine injection in case you go into anaphylactic shock. 


Due to marijuana’s legally grey standing (it’s federally prohibited however legalized in most states), and complex and various biochemical structure, discovering a clinic that can take a look at may be tough.

skin prick allergy test

Pores and skin prick allergy take a look at. Supply: iStock

Individuals who suspect that they’ve an allergy might be able to take a pores and skin prick or blood take a look at. Leaves, buds, and flowers from the C. sativa plant could also be utilized in a pores and skin prick take a look at. Blood checks are much less widespread, much less dependable, and extra price prohibitive. 


The dearth of analysis on cannabis immunotherapy makes it troublesome to prescribe a typical therapy plan. This can probably stay the case till federal cannabis prohibition is lifted—it’s practically not possible for researchers to entry cannabis for the scientific discovery wanted to develop this sort of remedy.

Consequently, one of the simplest ways to deal with a cannabis allergy is to keep away from coming into contact with it if you happen to suspect it’s possible you’ll be allergic. If you happen to do expertise an allergic response, contact your physician. Relying on the severity of the response, your physician will probably prescribe an antihistamine to help in managing the signs.

Allergic reactions ought to resolve on their very own inside weeks as soon as cannabis publicity is eradicated. 

If you happen to work in a cannabis processing or producing facility otherwise you in any other case can not keep away from coming into contact with the plant, using antihistamines, gloves, facemasks, and inhalers might scale back the severity of your signs.

Due to the small chance of growing anaphylaxis, you will need to seek the advice of together with your physician about danger administration.   

Hashish is an Allergen

Hashish sativa, like all different vegetation, comprises pollen, an especially pervasive and worsening allergen subtype. It additionally comprises proteins widespread to different vegetation which were implicated within the growth of meals allergic reactions. Current research present that Can s 3, the nsLTP (non-specific lipid switch protein) of Hashish sativa constitutes an vital allergen as a result of Can s 3-based mostly diagnostics shows one of the best efficiency. 

Consequently, sensitization to the allergen Can s 3, the ns‐LTP from Hashish sativa, might result in a broad number of cross‐reactions. This basically means the potential for cross‐reactivity with tobacco, pure latex and plant‐meals‐derived alcoholic drinks.

In a 2019 report, Canadian researchers describe attainable allergens liable for cannabis allergy embody THC, four nonspecific lipid switch protein (Can s 3),5, 6 and others. 

An attention-grabbing preliminary research in 2018 demonstrated that marijuana use is related to sensitization to particular allergens, together with molds, mud mites, vegetation, and cat dander. In lay phrases, use of marijuana can create sensitivities to the above allergens that didn’t in any other case exist within the person. 

The authors suggest to make use of the sIgE hemp assay (crude extract utilizing an ImmunoCAP method) the place there’s a suspicion of a cannabis allergy as a adverse consequence makes a cannabis allergy unlikely.  Nonetheless, a constructive sIgE hemp all the time wants extra diagnostic work-up with a Can s Three based mostly diagnostic.

Clearly, extra analysis must be carried out to determine IgE reactivity profile in Hashish sativa.

Are Hashish Allergy symptoms Turning into Extra Frequent? 

With the fast development of the authorized cannabis business comes elevated alternative for publicity. Along with the cannabis used for medicinal functions, hemp (a non-psychoactive number of the Hashish sativa plant) is utilized in 1000’s of merchandise. In response to the American Academy of Allergy Bronchial asthma and Immunology (AAAAI), this makes publicity and subsequent sensitization to cannabis extraordinarily widespread.

Folks might develop a sensitivity to cannabis by consuming or touching cannabis merchandise.  The AAAAI predicts that experiences of cannabis allergic reactions will develop into more and more prevalent because the business expands.

However the medically-based utilization of cannabis the augmented curiosity for extremely nutritious meals has elevated the widespread availability and use of hemp seeds ( a super-food excessive in protein)within the meals business, which might contribute to the frequency of hemp seed allergy and presumably cannabis cross-reactivity. 

Along with hempseed and hempseed oil, derivatives of dried flowers or resinous extract might be included in meals and ingested. Since each hemp and cannabis can induce clinically related allergic cross-reactivity one can get a hemp allergy with out being uncovered to hemp which might in flip manifest as extreme anaphylaxis or different lesser signs.

Why you don’t hear about cannabis allergic reactions

A 2016 Photodetection in Circulation Cytometry evaluation decided that the prevalence of cannabis allergic reactions is probably going underreported because of the plant’s illegality in some states and in federal legislation. The authors defined that much more folks than the general public might take heed to are prone to growing cannabis sensitivity. These teams embody however aren’t restricted to:

  • Law enforcement officials who seize unlawful pot
  • Leisure customers who inhale or ingest cannabis merchandise
  • Hashish growers
  • Laboratory scientists who take a look at the plant

Others might inhale cannabis allergens whereas strolling the road or come into contact with pot when in proximity to somebody actively utilizing cannabis merchandise.

Pores and skin-to- cannabis contact might lead to urticaria (rash) or contact dermatitis, inhaling cannabis might lead to season allergy-like respiratory irritation, and ingesting cannabis might result in gastrointestinal discomfort, swelling, and in extreme circumstances, anaphylaxis. 

If You might be Allergic to These Issues, You Could also be Allergic to Hashish 

A 2017 Revue de Pneumologie Clinique evaluation discovered that cannabis allergic reactions could also be triggered by meals which have an identical chemical composition to weed. This phenomenon is called cross-allergy or cross-reactivity. It happens when the physique has an allergic response to at least one meals, however then turns into delicate to different meals or vegetation that include related proteins to the unique allergy inducing plant.

When you have a historical past of allergic reactions, you need to use your data about your meals sensitivities to make an informed guess concerning the chance of growing a cannabis allergy. Sure meals include a molecular composition much like marijuana. When you have an allergy to any of the next meals, it’s possible you’ll be delicate to cannabis as nicely: 

  • tomatoes 
  • nuts
  • apple
  • peaches
  • bananas
  • grapefruit
  • orange
  • chestnuts
  • eggplant