https://www.synthroidpro.com/references 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/sitemap 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/ 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill--yellow.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-video.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-calculator.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-cost.svg https://www.synthroidpro.com/prescribing 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/yoga_women_imagery.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-grain.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-rx.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-bottle-desktop.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/biking_woman_imagery-desktop.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-pills-bottle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/prescription.png https://www.synthroidpro.com/dosing 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-orange.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-white.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-violet.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-olive.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill--yellow.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-rose.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-brown.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-turquoise.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-blue.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-lilac.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-pink.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/pill-green.png https://www.synthroidpro.com/content/dam/synthroidivy/images/icons/guide--yellow.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/chart-tsh-range-desktop.png A chart depicting TSH ranges in mIU/L. The therapeutic range recommended by the AACE/ATA, from 0.45 to 4.12, is emphasized in the middle. Values below 0.45 indicate hyperthyroidism, shown on the left, and values above 4.12 indicate hypothyroidism, shown on the right. https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-arrow-up-down.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-lemon.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-pill-capsule.svg https://www.synthroidpro.com/cost-coverage 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/tablet-HCP-graphic.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/saving-card.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-delivers-logo.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-pay-card.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-cost.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-delivered.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-updates.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-check--green.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-clipboard.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-website.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-notifications.svg https://www.synthroidpro.com/patient-resources 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-people.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-doctor.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-care.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-documents.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-pregnant.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-synthroid-pill.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-thyroid.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/group-women-men-walking-tab-desktop.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-laptop.svg https://www.synthroidpro.com/content/dam/synthroidivy/images/icons/icon-cost-blue.svg https://www.synthroidpro.com/clinical-scenarios 2025-04-29 https://www.synthroidpro.com/content/dam/synthroidproivy/images/logos/synthroid-logo--light.png Synthroid® (levothyroxine sodium tablets,USP) healthcare professionals homepage. https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/male-patient.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/pregnant-patient.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/photos/elderly-patient.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-health-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-alert-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-pill-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-noteable-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-check-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/icons/icon-star-circle.svg https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/thyroid-disease-prevalence-study-desktop.png https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/chart-tsh-dose-adjustment-desktop.png The chart shows how thyroid-stimulating hormone (TSH) levels vary for 21 patients after adjustments to their levothyroxine dosage. For many patients, small changes in dosage—either increasing or decreasing by 25 micrograms—caused significant shifts in their TSH levels. The majority of patients' optimal TSH levels fall within a recommended therapeutic range, but the chart highlights the sensitivity of TSH levels to dose changes, emphasizing the importance of careful and individualized dosing to maintain stability. https://www.synthroidpro.com/content/dam/synthroidproivy/images/graphics/chart-tsh-increasechart-mobile.png The chart summarizes findings from the NHANES III survey (1988–1994), which measured thyroid-stimulating hormone (TSH) levels in a population of over 13,000 people. It shows that the percentage of individuals with elevated TSH levels (greater than 4.5 mIU/L) increases with age. The youngest age groups, such as 12–19 and 20–29, have the lowest percentages, around 2%. The percentage rises gradually across decades, reaching over 10% in those aged 80 and older. This data highlights that older age groups are more likely to have elevated TSH levels, suggesting an age-related trend in thyroid function.