How Does Xolair 150mg Injection Work?
Xolair 150 mg Injection (omalizumab) works primarily by targeting and inhibiting immunoglobulin E (IgE), a key mediator in allergic responses. Here’s a concise explanation of its mechanism of action:
IgE Binding: Xolair is a humanized monoclonal antibody that selectively binds to free IgE in the bloodstream. By doing so, it prevents IgE from attaching to its high-affinity receptor, FcεRI, located on the surface of mast cells and basophils.
Reduction of Allergic Response: This inhibition reduces the activation of these immune cells and limits the release of inflammatory mediators (such as histamines and cytokines) that contribute to allergic reactions and asthma symptoms.
Decrease in Free IgE Levels: Treatment with Xolair leads to a significant reduction in serum free IgE levels, often exceeding 95%, which helps decrease the overall allergic response in patients with conditions like allergic asthma and chronic spontaneous urticaria.
Long-term Effects: The reduction in free IgE also results in decreased expression of FcεRI receptors on basophils, further diminishing the potential for allergic reactions over time.
How Should You Take Xolair 150mg Injection?
To take Xolair 150 mg Injection (omalizumab) correctly, follow these guidelines:
Use a new 3 mL syringe with an 18-gauge needle to withdraw the solution from the vial.
Replace the 18-gauge needle with a 25-gauge needle for injection.
Ensure the total volume is adjusted to deliver either 150 mg (1.2 mL) or 75 mg (0.6 mL) as prescribed.
Choose an injection site in the front of the thigh or lower abdomen, avoiding areas around the belly button and any skin that is tender or bruised.
If multiple injections are needed, ensure they are at least 2 cm apart.
Clean the injection site with an alcohol wipe and allow it to dry.
Pinch the skin to elevate it and insert the needle at a 45-degree angle.
Slowly press the plunger to inject the solution over 5-10 seconds.
After injecting, remove the needle and apply gentle pressure to the site if needed.
Dispose of needles and syringes safely.
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