Drilldown: Medicines
Use the filters below to narrow your results.
generic:
brand:
Alphagan P (ophthalmic glaucoma), Mirvaso (topical rosacea) (1) ·
Armour Thyroid, NP Thyroid, Nature-Throid, WP Thyroid (1) ·
Sudafed (IR, 12-hour, 24-hour); many combination products including Claritin-D, Allegra-D, Zyrtec-D, Mucinex-D (1) ·
Synthroid, Levoxyl, Tirosint, Unithroid, Euthyrox (1) ·
Trusopt; with timolol as Cosopt (1)
classes:
[[:Category:Alpha-2_agonists|Alpha-2 adrenergic agonist]] (1) ·
[[:Category:Carbonic_anhydrase_inhibitors|Carbonic anhydrase inhibitor (topical)]] (1) ·
[[:Category:Decongestants|Decongestant]] (1) ·
[[:Category:Glaucoma_medications|Glaucoma medication]] (2) ·
[[:Category:Hormone_replacement|Hormone replacement]] (2) ·
[[:Category:Ocular_hypotensive_agents|Ocular hypotensive agent]] (2) ·
[[:Category:Sympathomimetics|Sympathomimetic (indirect-acting)]] (1) ·
[[:Category:Thyroid_hormones|Thyroid hormone]] (2)
mechanism:
None (3) ·
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:
'"`UNIQ--vote-00000017-QINU`"', '"`UNIQ--vote-00000018-QINU`"', '"`UNIQ--vote-00000019-QINU`"', '"`UNIQ--vote-0000001A-QINU`"' (1) ·
'"`UNIQ--vote-00000018-QINU`"', '"`UNIQ--vote-00000019-QINU`"' (1) ·
'"`UNIQ--vote-00000033-QINU`"', '"`UNIQ--vote-00000034-QINU`"', '"`UNIQ--vote-00000035-QINU`"' (1) ·
'"`UNIQ--vote-00000B08-QINU`"', '"`UNIQ--vote-00000B09-QINU`"' (1) ·
'"`UNIQ--vote-000010CE-QINU`"', '"`UNIQ--vote-000010CF-QINU`"', '"`UNIQ--vote-000010D0-QINU`"' (1)
starting dose:
1 drop in affected eye(s) TID (monotherapy); BID with timolol (Cosopt) (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) ·
IR: 60 mg PO every 4-6 hours. 12-hour ER: 120 mg PO every 12 hours. 24-hour ER: 240 mg PO once daily. Pediatric: weight-based (1) ·
Ophthalmic 1 drop in affected eye(s) TID; topical Mirvaso 0.33% gel applied to face daily (1)
preparations:
0.1%, 0.15%, 0.2% ophthalmic solutions; 0.33% topical gel; combinations with timolol (Combigan) and brinzolamide (Simbrinza) (1) ·
15, 30, 60, 90, 120, 180, 240, 300 mg tablets (1/4 to 5 grains; 1 grain = 60 mg) (1) ·
2% ophthalmic solution (Trusopt); 2%/0.5% fixed combination with timolol (Cosopt, Cosopt PF) (1) ·
25, 50, 75, 88, 100, 112, 125, 137, 150, 175, 200, 300 mcg tablets; oral capsule and IV/IM also available (1) ·
IR tablets 30, 60 mg; 12-hour ER tablets 120 mg; 24-hour ER tablets 240 mg; oral liquid; multiple combination products with antihistamines, NSAIDs, or expectorants (1)
fda max: (Click arrow to add another value)
routes:
onset:
duration:
halflife:
9-16 hours (pH-dependent: acidic urine shortens, alkaline urine substantially extends)'"`UNIQ--ref-0000001B-QINU`"' (1) ·
T4 ~7 days; T3 ~1 day'"`UNIQ--ref-0000001A-QINU`"' (1) ·
~3 hours'"`UNIQ--ref-000010D1-QINU`"' (1) ·
~4 months in erythrocytes (carbonic anhydrase binding in red cells; not relevant to topical IOP duration)'"`UNIQ--ref-00000B0A-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 measurable systemic absorption (small CA inhibition observed clinically with chronic use)'"`UNIQ--ref-00000B0B-QINU`"' (1) ·
Topical; clinically meaningful systemic absorption can produce systemic α2 effects (somnolence, hypotension), especially in children'"`UNIQ--ref-000010D2-QINU`"' (1) ·
Variable; reduced by food, calcium, iron, PPIs'"`UNIQ--ref-0000001B-QINU`"' (1) ·
~90% (oral, low first-pass)'"`UNIQ--ref-0000001C-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) ·
Limited data.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Limited data; weigh against alternatives.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1) ·
Some controversial signal for first-trimester gastroschisis association in observational studies; limited use is generally considered acceptable after the first trimester.<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)
legal:
'''[[USLegal:Behind-the-counter|Behind-the-counter]] in US''' under the Combat Methamphetamine Epidemic Act 2005: purchase restricted to ≤3.6 g/day and ≤9 g/30 days, with photo ID, logbook signature, and quantity logging required. Several states schedule higher than federal (1) ·
[[USLegal:Prescription only|Rx-only]] in US (4)
Showing below up to 5 results in range #1 to #5.