Allergy shots are a common and effective treatment for persistent allergy symptoms. Some individuals experience fatigue after these injections. This article explores why this side effect can occur and how it might be managed.
How Allergy Shots Work
Allergy shots, also known as allergen immunotherapy, introduce small, increasing amounts of specific allergens into the body. This process gradually desensitizes the immune system, reprogramming it to tolerate these substances rather than overreacting.
Over several months to years, the body builds tolerance, reducing or preventing allergic symptoms. Injections are initially frequent, often one to three times a week. As the immune system adjusts, frequency decreases to about once a month during the maintenance phase.
This gradual exposure shifts the immune response away from an allergic reaction towards a more tolerant state. It lessens the body’s hypersensitivity to common allergens like pollen, dust mites, pet dander, and insect venom.
The Connection Between Allergy Shots and Fatigue
Fatigue can occur after allergy shots because the immune system actively builds tolerance. When allergens are introduced, immune cells process these substances, requiring energy. This active immune response can lead to tiredness.
Immune system activation triggers the release of signaling molecules called cytokines. These pro-inflammatory cytokines influence the central nervous system, leading to feelings of fatigue. This tiredness often signals the immune system is adapting and building tolerance.
Fatigue is a reported side effect for some individuals. It indicates the body is undergoing immunological changes to desensitize to allergens. This temporary energy dip usually resolves as the immune system adjusts to the treatment.
Managing Fatigue After Allergy Shots
To manage fatigue after allergy shots, ensure adequate rest before and after your injection. Staying well-hydrated supports your body as it processes the introduced allergens.
Eating a balanced diet with sufficient protein and healthy fats provides sustained energy. Avoiding strenuous activity immediately after your shot helps conserve energy. For most individuals, any fatigue experienced is mild and temporary, often resolving within 24 hours.
Communicate any symptoms you experience with your healthcare provider. If fatigue is severe, persistent for more than a few days, or accompanied by other concerning symptoms, contact your doctor. They can assess your response and determine if adjustments to your shot schedule or dosage are necessary.