Asthma Home > Xolair Dosage

The recommended Xolair dosage will vary depending on several factors, such as your weight and the condition being treated. Generally, people with asthma who are smaller or who have lower IgE levels can take it every four weeks, while those who are larger or who have higher IgE levels can take Xolair every two weeks. This drug comes in the form of an injection that is generally administered by your healthcare provider.

An Introduction to Xolair Dosage

The dose of Xolair® (omalizumab) that your healthcare provider recommends will vary depending on a number of factors, including:
 
  • Your weight
  • The medical condition being treated
  • The results of a lab test measuring your IgE level. IgE is an antibody that plays an important role in allergic reactions.
     
As always, do not adjust your Xolair dosage unless your healthcare provider specifically instructs you to do so.
 

Xolair Dosing for Asthma

When treating ashtma, Xolair is given by injection every two to four weeks. In general, smaller people or people with lower IgE levels can take Xolair every four weeks, and those who are larger or who have higher IgE levels will need Xolair every two weeks. The exact dose depends on your weight and your IgE level. Your IgE level will be measured using a blood test before you start Xolair. If you have your IgE level measured again while you are taking Xolair, your Xolair dose should not be adjusted based on this measurement (since Xolair affects IgE levels).
 

Dose of Xolair for Chronic Idiopathic Urticaria

When treating chronic idiopathic urticaria, the standard dosage of Xolair is 150 mg or 300 mg given by injection once every four weeks. When used for this condition, the amount does not vary by weight or IgE levels.
 
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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