Transcript Chapter16/18 Drugs_Alcohol

Chapter 16/18
Drugs/Alcohol
Formula to Follow
• No more 3drinks/occasion
• No more than 2/wk
• Drink on full stomach
• Metabolize 1 drink/hour
Bodies Defense
• Taste bad
• Throw up
• Pass out
Drug Use
• Quick fix
–Headache, stomach ache,
fatigue, mood
• Need to change lifestyle
Drugs Defined
• Substance alters biological
process
–Increase, decrease, start, or
stop body process
• Classified-biological effect
–Diuretic, analgesic, stimulant
How They Work
• Drugs hook to cell protein
receptors
• Resemble natural chemical
• Prevent or increase release
neurotransmitters
Side Effects
• Unintended action
• Drug binds to several
cells
Contraindication
• Medical reason not to
take a drug
–Pregnant, age, taking
another drug
Route Administration
• Ingest
• Inhale
• Inject
• absorb
Metabolism
•Liver- destroys
•Kidney/lungs-eliminate
Effectiveness
• Therapeutic Index- how safe
– Effective dose(ED50)- effective in
50%
– Lethal dose(LD50)- lethal dose in
50%
• LD50/ED50
• Want large difference
Legal Use
• Prescription= $100 billion/yr
• Non-prescription=$12
billion/yr
• Most sold=psychoactive
drugs
–Sleeping, mood altering
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• Heavy regulated
–Effectiveness, side effects,
precaution, contraindications
• TV and Internet
–Little regulated