Levothyroxine

🧮 Dose calculator

Hypothyroidism · Regimen source: FDA Levothyroxine · 2.3, Table 2

• • Starting daily dose; titrate every 2 weeks by TSH or free T4. Empty stomach, 30–60 min before breakfast. FDA Levothyroxine · 2.3FDA Levothyroxine · 2.1

Enter age and weight.

👥 Special populations

• 🤰 PregnancyUse with caution

  Label states no clear risk or has limited data; use only if needed, under medical advice. FDA Levothyroxine · 8.1

  “Risk Summary The clinical experience, including data from postmarketing studies, in pregnant women treated with oral levothyroxine to maintain euthyroid state have not reported increased rates of major birth defects, miscarriages, or other adverse maternal or fetal outcomes.”

• 🤱 BreastfeedingUse with caution

  Label: use with caution while breastfeeding; see the label text. FDA Levothyroxine · 8.2

  “Risk Summary Published studies report that levothyroxine is present in human milk following the administration of oral levothyroxine.”

• 👶 ChildrenUse with caution

  The label has conditions, age limits or notes for children; the label sentence is quoted below. FDA Levothyroxine · 8.4

  “Levothyroxine sodium is indicated in patients from birth to less than 17 years of age: As a replacement therapy in primary (thyroidal), secondary (pituitary), and tertiary (hypothalamic) congenital or acquired hypothyroidism.”

• 👴 Older adultsUse with caution

  Label: use with caution in older adults, usually starting at the low end of the dose range. FDA Levothyroxine · 8.5

  “… levothyroxine sodium at less than the full replacement dose [see Dosage and Administration ( 2.3 ) and Warnings and Precautions ( 5.2 )].”

• ⚥ Females & males of reproductive potentialNo data

  The source for this drug has no section for this group.