Felis Catus Hair: Side Effects, Uses & Monitoring
Studies have shown that skin tests with cat extract are useful in the diagnosis of cat allergy.
- Data source
- FDA labeling via NIH DailyMed (label abffdafd…)
- Label version
- current
- Last reviewed
- 2026
Reported adverse reactions
Reactions listed in current FDA labeling, with the highest frequency reported across summarized placebo-controlled trials.
No structured frequency data available in current labeling. Consult the official label.
Labeled uses (from FDA prescribing information)
Studies have shown that skin tests with cat extract are useful in the diagnosis of cat allergy. As a rule, persons with cat allergy have positive skin reactions when tested with cat extract, and non-allergic individuals rarely react (7, 8, 9). However, the relationship between a positive skin test and the appearance of clinical symptoms after exposure to a cat is not absolute, i.e., some skin-test positive persons do not experience allergic symptoms after exposure (10). Failure to experience symptoms may be dose related, since it is known that cats vary significantly in the amount of Fel d1 they produce (11). The efficacy of cat extract immunotherapy in the treatment of bronchial asthma has been shown in two studies (12, 13) A reduction in bronchial sensitivity was observed in five patients with cat allergy, whereas no reduction was observed in placebo treated, cat-allergic patients.
Frequently Asked Questions
What is Felis Catus Hair used for?
FDA labeling lists the approved uses shown above under "Labeled uses." This summary is informational; only a qualified prescriber can determine whether a medication is appropriate for you.
What are the most commonly reported side effects of Felis Catus Hair?
Current labeling for this ingredient does not include a structured frequency table that we can reproduce. Review the official label linked below.
Does Felis Catus Hair require lab monitoring?
Monitoring needs vary. Ask your healthcare provider whether any lab tests apply while taking Felis Catus Hair.
Where does this information come from?
All clinical facts on this page were extracted from the current FDA-registered product labeling for this ingredient, published by manufacturers through NIH DailyMed. See the source link below.
Medical disclaimer: Educational content extracted from public FDA labeling. Not medical advice. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.