• Anastrozole: Uses, Side Effects and Common Brands

  • Anastrozole was the first of the third-generation aromatase inhibitors, becoming available for the second-line treatment of advanced breast cancer in 1995.

    Aromatase belongs to the group of cytochrome P450 enzymes that are involved in steroid biosynthesis. It is found within peripheral tissues, including muscle, fat and liver, and within breast tumor cells.

    Aromatase is the final-step enzyme in oestrogen synthesis, converting the androgens androstenedione and testosterone to the oestrogens oestrone and oestradiol. Aromatase inhibitors work by blocking this converion, thus decreasing the availability of circulating oestrogen. The inhibition of oestrogen production is an effective therapy for women with hormone-dependent breast cancer. The aromatase inhibitors were developed for use in postmenopausal women, where oestrogen is synthesized predominantly by the peripheral conversion of the adrenal steroid androstenedione to oestrone. Anastrozole binds reversibly to the aromatase enzyme and is classed as a type II nonsteroidal aromatase inhibitor.

    In premenopausal women, the ovaries are the primary sites of oestrogen production. As the aromatase inhibitors are not able to completely block ovarian oestrogen synthesis, they cannot be used as the sole endocrine treatment in premenopausal patients. However, in this patient group, the aromatase inhibitors may be used in combination with agents that suppress ovarian function, such as goserelin, a gonadotrophin-releasing hormone agonist. However, there are only limited data to support this combination.

    In men anastrozole stimulates the body to produce more of its own testosterone, the substance fools the body's negative feedback system, and cause an increase in the pituitary's release of luteinizing hormone (LH), which in turn stimulates the testicles to make more testosterone. The beauty of this is that the rise in testosterone comes entirely from increased production by the man's body itself. In concept, this is the most natural form of treatment.

    Anastrozole is given at a clinical dose of 1 mg once daily. It has a half-life of 41 hours and it takes seven days to reach steady-state plasma levels.

    Anastrozole is produced by many reputable pharmaceutical companies such as:

    Arimixyl Kalpa Pharmaceuticals LTD, India
    35.00 USD 26.25 USD

    Anastro-Lab 7Lab Pharma, Switzerland
    56.00 USD 42.00 USD

    Arimidex 1 Maha Pharma
    26.00 USD 19.50 USD

    Arimidex Dragon Pharma, Europe
    70.00 USD 52.50 USD

    Anastrozol Balkan Pharmaceuticals
    72.00 USD 54.00 USD

    Anabrez Sun Pharmaceuticals Ind. Ltd.
    81.00 USD 60.75 USD

    Anaday Zuventus Healthcare Ltd.
    114.00 USD 85.50 USD

    Antreol Knoll Healthcare Pvt. Ltd.
    99.00 USD 74.25 USD

    Arimidex AstraZeneca
    180.00 USD 135.00 USD

    Armotraz Cipla, India
    75.00 USD 56.25 USD

    Anastrozole Ice Pharmaceuticals
    100.00 USD 75.00 USD

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