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Xanthines for Biology of Drugs

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Question
Answer
Class of stimulant that includes caffeine, theophylline, and theobromine   Xanthines  
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Which xanthine is primarily found in chocolate?   Theobromine  
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Caffeine is found in which foods?   Coffee, tea, and chocolate. Also, as an additive to drinks and other products.  
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Caffeine works by inhibiting which inhibitory neuromodulator?   Adenosine  
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Major symptom of caffeine withdrawal?   Headache  
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Symptoms of caffeine withdrawal   headache, irritability, lethargy, fatigue  
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Where is caffeine metabolized?   Liver  
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Caffeine’s half-life   3-5 hours  
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Which xanthine is priamily found in tea?   Theophylline  
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Medical use for theopylline?   Treat Asthma  
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Caffeine may cause upset stomach because?   Caffeine increases gastric secretions  
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Caffeine’s effect on heart rate   increases heart rate  
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True or False: Caffeine stimulates the Sympathetic Nervous System   True  
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True or False: Caffeine is a powerful diuretic   True  
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