What should you know about biological injection for asthma?

Biologics are considered when asthma remains difficult to control despite an appropriate inhaler plan and other prescribed treatment. Selection depends on your symptoms, attack history, allergy pattern, blood tests, and how your lungs respond to treatment.

The injection does not replace your reliever inhaler or your written asthma action plan. Some people notice fewer flare-ups over time, while others need a different approach. Monitoring helps the specialist judge benefit and possible reactions.

Keep taking prescribed inhalers unless your asthma team changes the plan. Attend scheduled injection visits, report new symptoms, and bring your inhalers or medication list to reviews. Ask whether you should remain under observation after an injection.

Learn the warning signs of worsening asthma, such as increasing [Wheezing](/symptoms/wheezing/), cough, or [Chest Tightness](/symptoms/chest-tightness/). Avoid known triggers where practical, including allergens that your clinician has identified.

Use your reliever and follow your action plan if symptoms worsen. Seek emergency help if you are struggling to speak, breathing is rapidly worsening, lips look blue or grey, or the reliever is not helping as directed. After an injection, urgent help is needed for facial swelling, throat tightness, widespread hives, or sudden breathing difficulty.

A nebuliser may be used in urgent settings, but it does not replace prompt assessment when an attack is severe.

Ask which immune pathway the medicine targets, how it will be given, when improvement will be reviewed, what reactions to watch for, and what to do if you miss an appointment. Discuss allergies and any history of [Allergic Rhinitis](/conditions/allergic-rhinitis/).