Drilldown: Medicines
Medicines > fda max 
:
50 g/week (cream/ointment); 2-week continuous limit; 4-week maximum cumulative or
No fixed maximum; titrated to TSH target
:
50 g/week (cream/ointment); 2-week continuous limit; 4-week maximum cumulative or
No fixed maximum; titrated to TSH target Use the filters below to narrow your results.
brand:
classes:
super-potent)]] (1) ·
[[:Category:Corticosteroids|Corticosteroid]] (1) ·
[[:Category:Glucocorticoids|Glucocorticoid]] (1) ·
[[:Category:Hormone_replacement|Hormone replacement]] (2) ·
[[:Category:Thyroid_hormones|Thyroid hormone]] (2) ·
[[:Category:Topical_corticosteroids|Topical corticosteroid (Class I (1)
mechanism:
None (1) ·
Synthetic T4 (thyroxine); peripherally deiodinated to T3 (triiodothyronine), the active hormone. '"`UNIQ--vote-00000031-QINU`"' Narrow therapeutic index; brand-to-generic switches can shift TSH and require re-titration'"`UNIQ--ref-00000032-QINU`"'. (1) ·
'"`UNIQ--vote-00000016-QINU`"' Brand-to-brand and lot-to-lot variability in T3:T4 ratio is greater than with synthetic levothyroxine, which is why endocrine guidelines prefer the synthetic'"`UNIQ--ref-00000017-QINU`"'. (1)
uses:
starting dose:
1.6 mcg/kg/d in young healthy adults; 25-50 mcg/d in elderly or cardiac disease, titrated by TSH at 6-8 weeks (1) ·
30 mg PO daily (1/2 grain); titrate by TSH at 6-8 weeks; 60 mg desiccated thyroid is approximately equivalent to 88-100 mcg levothyroxine (1) ·
Apply a thin film to affected area BID; '''limit to 2 weeks''' continuous use and ≤50 g/week (cream/ointment); ≤50 mL/week (foam/solution); avoid face, intertriginous areas (1)
preparations:
15, 30, 60, 90, 120, 180, 240, 300 mg tablets (1/4 to 5 grains; 1 grain = 60 mg) (1) ·
25, 50, 75, 88, 100, 112, 125, 137, 150, 175, 200, 300 mcg tablets; oral capsule and IV/IM also available (1) ·
Cream, ointment, lotion, foam, solution, shampoo, spray at 0.025-0.05%; emollient and non-emollient bases (1)
fda max: (Click arrow to add another value)
routes:
onset:
halflife:
Not meaningfully described for topical use (systemic exposure varies with surface area, occlusion, skin integrity)'"`UNIQ--ref-0000079E-QINU`"' (1) ·
T4 ~7 days; T3 ~1 day'"`UNIQ--ref-0000001A-QINU`"' (1) ·
~7 days (euthyroid); longer in hypothyroidism (~9-10 days), shorter in hyperthyroidism'"`UNIQ--ref-00000036-QINU`"' (1)
bioavailability:
40-80% (oral); reduced by food, calcium, iron, PPIs, fiber; take fasting with water'"`UNIQ--ref-00000037-QINU`"' (1) ·
Topical with variable systemic absorption depending on body site, occlusion, and skin integrity; HPA-axis suppression is documented even with brief courses to large areas'"`UNIQ--ref-0000079F-QINU`"' (1) ·
Variable; reduced by food, calcium, iron, PPIs'"`UNIQ--ref-0000001B-QINU`"' (1)
pregnancy:
First-line in pregnancy; dose typically increased 25-30% due to estrogen-driven rise in TBG and fetal demand. Lactation safe at physiologic doses.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Synthetic levothyroxine is the standard-of-care in pregnancy; desiccated thyroid use in pregnancy is not well studied.'"`UNIQ--ref-0000001C-QINU`"' (1) ·
Topical corticosteroids in pregnancy: use lowest potency and smallest area; super-potent agents like clobetasol are reserved for compelling indications.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1)
Showing below up to 3 results in range #1 to #3.