Levothyroxine Timing during Ramadan: A Randomized Clinical Trial.
Moeber M MahzariFahad Al RemthiIbrahim AjwahMohammed Al HazmiWesam MoafaAwad Al ShahraniSameerah Al ShehriMotasim BadriPublished in: International journal of endocrinology (2023)
TSH and FT4 significantly increased after Ramadan. However, the timing of levothyroxine intake per se had no influence on TSH or free T4 levels. Therefore, hypothyroid patients might take levothyroxine either 30 minutes or 3-4 hours after iftar with no meal for 1 hour, depending on preference.