Prescription medicine
Felis catus hair
Felis catus hair is a prescription medicine. No generic is listed in FDA's NDC Directory.
- No generic listed
- Boxed warning
Check it at the source: the felis catus hair FDA label on DailyMed (effective June 3, 2025); every felis catus hair label on DailyMed.
Highlights of the record
FDA label of June 3, 2025; NDC Directory, Drugs@FDA and Orange Book, October 8, 2026
This allergenic product is intended for use by physicians who are experienced in the administration of allergenic extracts and the emergency care of anaphylaxis, or for use under the guidance of an allergy specialist. Standardized Cat Hair Extract is not directly interchangeable with Standardized Cat Pelt Extract or Cat Extracts labeled in Allergy Units (AU/mL) The initial dose must be based on skin testing as described in the dosage and administration section of this insert. Patients being switched from other types of cat extracts to Standardized Cat Hair Extract should be started as though they were coming under treatment for the first time Patients should be instructed to recognize adverse reaction symptoms and cautioned to contact the physicians office if reaction symptoms occur. As with all allergenic extracts, severe systemic reactions may occur. In certain individuals these reactions may result in death. Patients should be observed for at least 20 minutes following treatment and emergency measures as well as personnel trained in their use should be immediately available in the event of a life threatening reaction. This product should not be injected intravenously (see Dosage and Administration). Refer also to the warnings, precautions, adverse reactions and overdosage sections below. […]
Used for
From the label: indications and usageStudies have shown that skin tests with cat extract are useful in the diagnosis of cat allergy.
Forms and strengths
Injection.
On the market
- Generic approvals
- No generic approved
- Labelers listed (NDC)
- 1 of which 0 under generic applications, 1 under brand applications, repackagers included
Supply and safety
- Pharmacy cost (NADAC)
- Not in the survey
- Shortage (FDA)
- No current entry
- Recalls by its makers (FDA)
- No recall recorded
- FAERS reports
- 163 through July 30, 2026
What is felis catus hair used for?
From the label: indications and usageStudies 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). […]
FDA pharmacologic class: Standardized Animal Hair Allergenic Extract.
Source: FDA drug label (Standardized Cat Hair), Allermed Laboratories, Inc., effective June 3, 2025 (SPL set abffdafd-f922-44ab-8e98-972a72ca1004), via openFDA; the full label on DailyMed
Is there a generic for felis catus hair?
No generic felis catus hair is approved (Drugs@FDA, October 8, 2026).
Source: Drugs@FDA, FDA NDC Directory and the Orange Book (openFDA bulk files, October 8, 2026)
What do FAERS reports show for felis catus hair?
The FDA Adverse Event Reporting System holds 163 reports that list felis catus hair among the medicines taken, through July 30, 2026, each a report of something that happened, not proof the medicine caused it; 0 are coded as a death and 7 as a hospital stay. Counts follow how widely a medicine is used and watched, and they are not a measure of how risky it is.
The most reported reactions
Source: FDA Adverse Event Reporting System (FAERS) via openFDA, reports through July 30, 2026
What next?
- Felis catus hair side effects
- the label's list beside FAERS reports
- Check an interaction
- what two or more labels say about each other