ch. 11 Flashcards

Caffeine

1
Q

what are the methylated xanthines

A

caffeine, theophylline, and theobromine

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2
Q

Is caffeine a stimulant?

A

Not exactly, as it just blocks adenosine so that our natural promotion of drowsiness is blocked.

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3
Q

where is adenosine found

A

A lot of it is in the cortex

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4
Q

what is caffeine’s half life

A

4 hours

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5
Q

how long does it take for caffeine to absorb and get into the brain.

A

30 mins

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6
Q

what is the peak nervous system stimulation for caffeine?

A

2 hours

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7
Q

what receptor are most adenosine at?

A

A1

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8
Q

which drug has the most cardiac stim & Coronary Dilat

A

theophylline (usually because of too much tea)

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9
Q

what product has caffeine

A

coffee

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10
Q

what product has theophylline

A

tea

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11
Q

what product has theobromine

A

chocolate

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12
Q

how many mg of caffeine is in a cup of coffee

A

100-150mg

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13
Q

does tea have more caffeine or theophylline?

A

theophylline (200mg)

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14
Q

what is the diagnosis for too much use of caffeine

A

“caffeinism (Caffeine Intoxication) as stated in the DSM-3.

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15
Q

How does 500mg effect your metabolic rate?

A

10% increase in metabolic rate, which can translate to the fetus if you are pregnant.

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16
Q

what is the peak blood absorption of caffeine?

A

30-60 mins

17
Q

what is the peak NS absorption of caffeine?

18
Q

what is paraxanthine

A

caffeine’s psychoactive metabolite.

19
Q

what is caffeine’s half life

20
Q

what is a toxic dose of caffeine?

A

greater than 10 grams.

21
Q

what is a theory on how caffeine is related to headache

A

The fact that caffeine constricts and dilates blood vessels. And the constriction of blood vessels are thought to cause headache.

22
Q

what amount causes withdrawal of caffeine

A

about 5 cups a day

23
Q

what does withdrawal look like with caffiene

A

headache, nausea, constipation, lethargy

24
Q

Is coffee really psychologically addicting

A

the concept of decaf coffee, the taste without the drug, people still drink it regardless.

25
Vasodilation
the dilation of blood vessels (caffeine can do this as well as constricting blood vessels).
26
does coffee cause cancer?
two prestigious cancer research organizations disagree with each other. (there is little evidence for cancer causing properites).
27
can babies in the womb degrade caffeine?
it doesn't have the enzyme to degrade caffeine til after birth
28
Does caffeine cross the placental barrier?
yes
29
casement studies
over 12 thousand people
30
are panic attacks and caffeine correlated?
yes
30
what have we found with caffeine usage during pregnancy
caffeine intake was not related to birth defects.