Key Facts
Hypothyroidism is a common clinical syndrome resulting from a deficiency of thyroid hormones, which in turn leads to a generalized slowing of metabolic processes. It affects approximately 4-5% of the population, with a significantly higher prevalence in women and the elderly.
Pathophysiology
The most common cause globally is iodine deficiency, whereas in iodine-sufficient regions like Pakistan, Hashimoto's thyroiditis (autoimmune) is the primary cause. Primary hypothyroidism involves the destruction of the thyroid gland itself, leading to low T4 and a compensatory rise in TSH. Secondary hypothyroidism results from pituitary or hypothalamic dysfunction.
Symptoms & Clinical Features
Diagnosis
Serum TSH is the most sensitive screening test. Primary hypothyroidism is confirmed by an elevated TSH (>4.5 mIU/L) and low Free T4. Subclinical hypothyroidism is defined by an elevated TSH with a normal Free T4.
Diagnostic Pathway
Initial Screening
Symptom review and baseline hormonal blood tests.
Confirmatory Testing
Advanced diagnostic protocols (e.g., OGTT, MRI, Suppression tests).
Personalized Plan
Tailored treatment strategy based on clinical results.
Treatment & Management
The mainstay of treatment is Levothyroxine (synthetic T4). Patients must take the medication on a strictly empty stomach, 30-60 minutes before breakfast, to ensure optimal absorption. Follow-up TSH monitoring is typically performed 6-8 weeks after any dose adjustment to achieve the euthyroid target (usually 0.4-2.5 mIU/L).
Personalized treatment plans for your health.