Drilldown: Medicines

Indomethacin (1) · Levothyroxine (1) · Thyroid (desiccated) (1) · Tramadol (1)

Armour Thyroid, NP Thyroid, Nature-Throid, WP Thyroid (1) · Indocin (oral, IV, suppository), Tivorbex (low-dose), Indo-Lemmon (1) · Synthroid, Levoxyl, Tirosint, Unithroid, Euthyrox (1) · Ultram (IR), Ultram ER, ConZip ER (1)

potent non-selective)]] (1) · weak μ-agonist with serotonin/norepinephrine reuptake inhibition)]] (1) · [[:Category:Analgesics|Analgesic]] (2) · [[:Category:Hormone_replacement|Hormone replacement]] (2) · [[:Category:NSAIDs|Non-steroidal anti-inflammatory (NSAID (1) · [[:Category:Opioid analgesics|Opioid analgesic (atypical (1) · [[:Category:Schedule IV controlled substances|Schedule IV controlled substance]] (1) · [[:Category:Thyroid_hormones|Thyroid hormone]] (2)

None (2) · 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)

'"`UNIQ--vote-00000018-QINU`"', '"`UNIQ--vote-00000019-QINU`"' (1) · '"`UNIQ--vote-0000001F-QINU`"', '"`UNIQ--vote-00000020-QINU`"', '"`UNIQ--vote-00000021-QINU`"', '"`UNIQ--vote-00000022-QINU`"', '"`UNIQ--vote-00000023-QINU`"', '"`UNIQ--vote-00000024-QINU`"', '"`UNIQ--vote-00000025-QINU`"' (1) · '"`UNIQ--vote-00000020-QINU`"', '"`UNIQ--vote-00000021-QINU`"', '"`UNIQ--vote-00000022-QINU`"', '"`UNIQ--vote-00000023-QINU`"' (1) · '"`UNIQ--vote-00000033-QINU`"', '"`UNIQ--vote-00000034-QINU`"', '"`UNIQ--vote-00000035-QINU`"' (1)

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) · Acute gout: 50 mg PO TID until symptom relief, then taper; maximum 200 mg/day for 3-5 days. Rheumatoid arthritis / osteoarthritis: 25-50 mg PO BID-TID. Patent ductus arteriosus: 0.2 mg/kg IV, then 0.1-0.2 mg/kg every 12-24 hours for 2 doses (1) · IR: 25-50 mg PO every 4-6 hours as needed, titrate as tolerated. ER: 100 mg PO once daily, titrate by 100 mg every 5 days (1)

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) · Capsules 25, 50 mg; ER capsules 75 mg; oral suspension 25 mg/5 mL; suppositories 50 mg; injection 1 mg/vial (PDA closure) (1) · IR tablets 50 mg; ER tablets 100, 200, 300 mg (Ultram ER, ConZip); oral solution 5 mg/mL; combination products with acetaminophen (Ultracet) (1)

200 mg/day (typical adult oral) (1) · 400 mg/day (IR, adult); 300 mg/day (ER); 300 mg/day in elderly >75 years (1) · No fixed maximum; titrated to TSH target (2)

intravenous (PDA closure only) (1) · IV (1) · Oral (4) · rectal (1)

30-60 minutes (IR) (1) · 30-60 minutes (oral); rapid relief in acute gout (1) · TSH normalization 4-8 weeks (1) · TSH normalization 4-8 weeks; symptomatic improvement weeks to months (1)

None · 24 hours · 4-6 hours · 12 hours · 6-8 hours · Daily dosing · 8-12 hours · 12-24 hours · Hours · Hours per application · 24 hours (HS dosing) · 24 hours (once-daily dosing) · 24 h · N/A · N/A (replacement) · Variable · ~7-8 hours · 3-5 hours · 4-6 hours (IR); 24 hours (ER) · 6-12 hours

Other values:

Search

4-5 hours'"`UNIQ--ref-00000026-QINU`"' (1) · T4 ~7 days; T3 ~1 day'"`UNIQ--ref-0000001A-QINU`"' (1) · Tramadol 6-7 hours; M1 active metabolite 7-9 hours'"`UNIQ--ref-00000024-QINU`"' (1) · ~7 days (euthyroid); longer in hypothyroidism (~9-10 days), shorter in hyperthyroidism'"`UNIQ--ref-00000036-QINU`"' (1)

40-80% (oral); reduced by food, calcium, iron, PPIs, fiber; take fasting with water'"`UNIQ--ref-00000037-QINU`"' (1) · Variable; reduced by food, calcium, iron, PPIs'"`UNIQ--ref-0000001B-QINU`"' (1) · ~100% (oral)'"`UNIQ--ref-00000027-QINU`"' (1) · ~75% (IR, rises with multi-dose administration due to saturable first-pass)'"`UNIQ--ref-00000025-QINU`"' (1)

Avoid from 20 weeks gestation onward per FDA's 2020 expanded NSAID warning; contraindicated from 30 weeks (risk of premature ductus arteriosus closure, which is paradoxically the basis of the neonatal PDA-closure indication)'"`UNIQ--ref-00000028-QINU`"' (1) · Chronic third-trimester exposure produces neonatal opioid withdrawal syndrome and respiratory depression at delivery.<sup class="pcp-cn" title="This claim needs a citation.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</sup> (1) · 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.">&#91;[[Pharmacopedia:Citation needed|citation&nbsp;needed]]&#93;</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)

[[USLegal:Prescription only|Rx-only]] in US (3) · [[USLegal:Schedule IV|Schedule IV controlled substance]] in US (federally scheduled 2014); some states schedule higher'"`UNIQ--ref-00000026-QINU`"' (1)