Psychology 2020A/B Chapter Notes - Chapter 3: Nicotine Patch, Digoxin, Ibuprofen

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Chapter 3: How drugs work in the body and on the mind.
Drug administration and absorption
Oral ingestion
- Oldest and easiest way of taking drugs
- Safest method of drug admin
- Begins after 5 mins after ingestion, but full ingestion is complete 6 8 hours.
- Weakly acidic drugs are absorbed faster
- If drugs are lipid soluble
- When consumed orally, you usually have to take higher doses.
Injection
- Directly into the bloodstream
- READ the 3 types of injection from textbook (Pg 62-63)!!
- If injected into a muscle = high absorption
Inhalation
- Can be vapour or smoked
- Is the fastest method of drug admin
- Second easiest way of taking a drug
- Reaches the brain faster than any other way, 5-8 seconds
- Can cause lung damage
Absorption
- When the drug passes through membranes outside of the body
- Eg: nicotine patch, birth control patchs
- Whne ppl snort cocaine it sticks to the mucus and goes through the nasal membrane
- Rectal suppository absorped from the anus.
Note
- Oral is the slowest method of drug admin
- Second slowest absorption
- Third slowest injection, the most dangerous b/c ppl can inject high doses at a time.
- Fastest inhalation
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