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Levothyroxine, also known as L-thyroxine, is a synthetic form of the thyroid hormone thyroxine (T 4). [5] [8] It is used to treat thyroid hormone deficiency (hypothyroidism), including a severe form known as myxedema coma. [5]
The results suggest that bone loss could be an effect of levothyroxine use in older adults, even when used at the appropriate dosage, which could be a concern in terms of osteoporosis risk.
The major form of thyroid hormone in the blood is thyroxine (T 4), whose half-life of around one week [4] is longer than that of T 3. [5] In humans, the ratio of T 4 to T 3 released into the blood is approximately 14:1. [6] T 4 is converted to the active T 3 (three to four times more potent than T 4) within cells by deiodinases (5′-deiodinase).
Modified-release dosage and its variants are mechanisms used in tablets (pills) and capsules to dissolve a drug over time in order to be released more slowly and steadily into the bloodstream, while having the advantage of being taken at less frequent intervals than immediate-release (IR) formulations of the same drug.
For example, if the desired total daily amount is 600 mg per day, they may decide a dosage plan that has one 200 mg dose taken three times a day, or one 300 mg dose taken twice a day, or a single 600 mg dose take once a day.
5–20 mg every 2 wks Estradiol cypionate: Depo-Estradiol: Estrogen: IM, SC: 2–10 mg/wk or 5–20 mg every 2 wks Estradiol dipropionate: Agofollin: Estrogen: IM, SC: 2–10 mg/wk or 5–20 mg every 2 wks Estradiol benzoate: Progynon-B: Estrogen: IM, SC: 0.5–1.5 mg every 2–3 days Estriol: Ovestin [c] Estrogen: Oral: 4–6 mg/day ...
There are reported cases of goiter and choanal atresia in fetus. [5] Furthermore, breast feeding is possible but only if lowest effective dose is used and neonatal development is closely monitored. For the above reasons, it is preferable to use PTU in pregnancy, especially in the first trimester, with the possibility of changing to carbimazole ...
An excipient is a substance formulated alongside the active ingredient of a medication.They may be used to enhance the active ingredient’s therapeutic properties; to facilitate drug absorption; to reduce viscosity; to enhance solubility; to improve long-term stabilization (preventing denaturation and aggregation during the expected shelf life); or to add bulk to solid formulations that have ...