Drilldown: Medicines
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Medicines > halflife
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1-3 minutes (very short)'"`UNIQ--ref-00000C0F-QINU`"'
or
~20 hours
or
~5 h (caffeine) 
:
1-3 minutes (very short)'"`UNIQ--ref-00000C0F-QINU`"'
or
~20 hours
or
~5 h (caffeine) 
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None (2) ·
Caffeine + theophylline + L-theanine. L-theanine (an amino acid unique to tea) modulates glutamate and produces an 'alpha-wave' calming overlay on caffeine's stimulation, hence tea's reputation as a 'cleaner' stimulant than coffee. (1) ·
Caffeine is a non-selective adenosine A1/A2A receptor antagonist; also weak PDE inhibition. Beans contain theobromine (3,7-DMX) and theophylline (1,3-DMX) in smaller amounts. (1)
Excessive daytime sleepiness or cataplexy in adults with narcolepsy (FDA-approved August 2019) (1) ·
'"`UNIQ--vote-000000CF-QINU`"', '"`UNIQ--vote-000000D0-QINU`"', '"`UNIQ--vote-000000D1-QINU`"' (1) ·
'"`UNIQ--vote-00000747-QINU`"', '"`UNIQ--vote-00000748-QINU`"' (1) ·
'"`UNIQ--vote-00000C0A-QINU`"', '"`UNIQ--vote-00000C0B-QINU`"', '"`UNIQ--vote-00000C0C-QINU`"', '"`UNIQ--vote-00000C0D-QINU`"', '"`UNIQ--vote-00000C0E-QINU`"' (1)
One cup (~40–60 mg caffeine; about half of brewed coffee) (1) ·
One cup (~80–145 mg caffeine for brewed; 60–100 mg for instant) (1) ·
SL 0.3-0.6 mg every 5 minutes up to 3 doses for acute angina (call EMS if not resolved after the third); IV infusion 5-10 mcg/min titrated; transdermal patch 0.2-0.4 mg/hr for 12-14 hours daily (nitrate-free interval prevents tolerance) (1) ·
Week 1: 8.9 mg PO once daily in the morning. Week 2: 17.8 mg. Week 3+: 35.6 mg (max). Titrate as needed. (1)
4.45 mg, 17.8 mg tablets (1) ·
Dried leaves, infused. Six major processings: white, green, yellow, oolong, black, pu-erh (1) ·
Roasted beans, ground; brewed (drip, French press, espresso, cold brew, percolated) (1) ·
SL 0.3, 0.4, 0.6 mg tablets; lingual spray 0.4 mg/spray; ER 2.5-9 mg capsules; transdermal patch 0.1-0.8 mg/hr; 2% ointment; 0.4% rectal ointment; 5 mg/mL IV (1)
None (1) ·
Limit to <200 mg/d (~2 cups brewed) (1) ·
Limited data; pitolisant may reduce hormonal contraceptive efficacy (1) ·
Used in obstetric emergencies (uterine relaxation, severe hypertension) when needed; otherwise limited routine use.<sup class="pcp-cn" title="This claim needs a citation.">[[[Pharmacopedia:Citation needed|citation needed]]]</sup> (1)
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