human alpha1-proteinase inhibitor at a glance
Medicine class
Human plasma-derived proteinase inhibitor replacement therapy.
Licensed role
Maintenance treatment for selected adults with severe alpha1-proteinase inhibitor deficiency and progressive emphysema.
Administration
Intravenous infusion after reconstituting the powder with water for injections.
Home treatment
A patient or caregiver may administer it after specialist assessment, training and regular technique reviews.
What is human alpha1-proteinase inhibitor used for?
Its licensed use requires specialist assessment.
Maintenance treatment to slow emphysema progression in adults with documented severe alpha1-proteinase inhibitor deficiency and progressive lung disease despite optimal pharmacological and non-pharmacological care.
How does human alpha1-proteinase inhibitor work?
Neutrophil elastase can damage the walls of the lungs’ air sacs if insufficiently controlled. Treatment replaces alpha1-proteinase inhibitor, increasing protective activity in blood and lung-lining fluid and limiting elastase-related tissue breakdown.
How to take human alpha1-proteinase inhibitor
The powder is reconstituted with the supplied water for injections and infused into a vein. Initial infusions require specialist supervision. Home administration requires training in aseptic preparation, infusion technique, record keeping and recognising allergic reactions.
Use only a clear, colourless to slightly yellow solution without visible particles.
Do not shake the vial or mix the solution with other medicines.
Record the product name and batch number after every infusion.
Stop a home infusion immediately and contact the clinical team if signs of allergy occur.
human alpha1-proteinase inhibitor side effects
Common or expected effects
- Dizziness
- Headache
- Shortness of breath
- Nausea
Get urgent medical advice
- Severe allergic or anaphylactic reaction, including breathing or swallowing difficulty, low blood pressure, fainting, hives, or facial and throat swelling
human alpha1-proteinase inhibitor in pregnancy
Controlled pregnancy studies are unavailable. Although fetal harm is considered unlikely, treatment should be used cautiously after specialist discussion of the expected benefit and uncertainty.
human alpha1-proteinase inhibitor while breastfeeding
It is unknown whether the protein passes into human milk. The prescriber should weigh the benefits of breastfeeding for the child against the benefits of continuing treatment for the mother.
human alpha1-proteinase inhibitor interactions
No formal interaction studies have been performed. The reconstituted product must not be mixed with other medicines in the same preparation or infusion.
Common questions about human alpha1-proteinase inhibitor
Answers are fully visible for fast scanning and source review.
What is it made from?
It is purified from donated human plasma using donor screening, testing and virus-removal or inactivation measures. Transmission of infection cannot be completely excluded.
Does it cure alpha1-antitrypsin deficiency?
No. It replaces some missing protective protein to slow emphysema progression; it does not correct the inherited genetic change.
Can it be given at home?
Sources
These sources were used to prepare and review this medicine page.
Prepared and reviewed by the iatroX editorial team.