LETONKO 2.5 mg (Letrozole) – Hormone Therapy for Estrogen-Responsive Breast Cancer & Ovulation Support LETONKO 2.5 mg contains letrozole, an aromatase inhibitor that helps lower estrogen levels in the body. It is prescribed in Pakistan for the treatment of hormone receptor-positive breast cancer in postmenopausal women, helping slow tumor growth and reduce the risk of recurrence. Under specialized medical supervision, letrozole may also be used to stimulate ovulation in women with certain fertility challenges. LETONKO should only be taken with a doctor’s prescription and regular monitoring, as it carries important safety considerations, including effects on bone health and hormonal balance.