Skip to main content

Meet with our product experts in one-on-one virtual sessions

Set Up a Meeting
Quick Connect

Fexofenadine Hydrochloride (Form 1 & Form X)

Fexofenadine Hydrochloride (Form 1 & Form X) API

Fexofenadine Hydrochloride (Form 1 & Form X) -API

CAS Number: 138452-21-8

Therapeutic Category
API Technology
Dose Form
Oral Solids
Dr Reddy's Development Status
Available Regulatory Filing
CEP Granted
Brazil DMF
Japan DMF
Korea DMF
Innovator Brand (USA)

Mechanism of Action

Fexofenadine hydrochloride, the major active metabolite of terfenadine, is an antihistamine with selective H1-receptor antagonist activity. Both enantiomers of fexofenadine hydrochloride displayed approximately equipotent antihistaminic effects. Fexofenadine hydrochloride inhibited antigen-induced bronchospasm in sensitized guinea pigs and histamine release from peritoneal mast cells in rats. The clinical significance of these findings is unknown. In laboratory animals, no anticholinergic or alpha1-adrenergic blocking effects were observed. Moreover, no sedative or other central nervous system effects were observed. Radiolabeled tissue distribution studies in rats indicated that fexofenadine does not cross the blood-brain barrier.


ALLEGRA is an H1-receptor antagonist indicated for:

  • Relief of symptoms associated with seasonal allergic rhinitis in patients ≥ 2 years of age
  • Treatment of uncomplicated skin manifestations of chronic idiopathic urticaria in patients ≥ 6 months of age

Dr. Reddy's Expertise

Headquartered in Hyderabad, India, Dr. Reddy's Laboratories is one of the leading Active Pharmaceutical Ingredients (API) manufacturers and suppliers globally for Fexofenadine Hydrochloride (Form 1 & Form X) API. Dr. Reddy's API business is a preferred partner to pharma companies across the US, Europe, Brazil, Latin America, Japan, China, Korea, Middle East and other emerging markets.

Dr. Reddy's API business thrives on the deep technical strengths established over the last 30+ years in the development and manufacture of complex APIs such as steroids, peptides, complex long chain molecules and highly potent APIs (HPAPIs / oncology drugs). This expertise is complemented by our prowess in intellectual property and regulatory affairs which helps us consistently meet and exceed regulatory standards. Dr. Reddy's Fexofenadine Hydrochloride (Form 1 & Form X) API is the outcome of the extensive expertise in R&D, IP, and Regulatory.

A key component in helping our customers be first to market is a responsive supply chain. We achieve this by making sure that all our facilities are operating efficiently and to the latest standards of quality, safety, and productivity. A strong interconnect between business and factories allows for a quick reaction to dynamic market changes, so that we can avert shortages and meet sudden surges in demand.

Contact Us

Please fill in the following form for API Requirement & we'll get back to you shortly

We are here to help, if you have any country specific requirements.


No information in this catalog - including any reference to any product or service - constitutes an offer for sale, or be construed as representing an offer for sale. Products protected under valid patents are not offered or supplied for commercial use. However, the research quantities of such products may be offered for the purpose of regulatory submissions, wherever such regulatory exemptions exist. The buyers should make their independent evaluation of the patent scenario for their respective markets and will be responsible for all patent related liabilities. Products protected under valid patents in India are not available for commercial use but would be available for Section 107A purposes.


Do not take it with juice such as grapefruit, orange, or apple juice . And also should not take antacids that contain aluminum or magnesium hydroxide within 15 minutes of taking this medicine.

Fexofenadine is a second generation antihistamine that is used for the treatment of allergic rhinitis, angioedema and chronic urticaria.

Fexofenadine hydrochloride is a BCS class II drug having low bioavailability of 30-40% and a half life of 14 hours.

Fexofenadine Hydrochloride have DMFs in the US, Brazil, CEP, Europe, Japan and Korea.

Fexofendaine should be stored at 25ºC room temperature.

Fexofenadine is available in oral capsule form with 30mg, 120mg and 180 mg strengths.