Drugs Flashcards
Types of drugs
Agonist and Antagonist
Agonist drugs
these drugs are designed to cause a change in normal physiological behaviour
Antagonist drugs
these are designed to inhibit some aspects of usual physiological behaviour
drugs used in radiology
……
drugs may cause
contraction of muscles gland secretion release of hormones cell death change in rate of cell division
where do drugs come from?
inorganic substances and organic substances
examples of inorganic substances
Mercury, Thallium, Lithium, iodine, fluorine
examples of organic substances
proteins, polysaccharides, polynucleotides
early drugs were derived from
nature, especially plants such as opiates (poppies), atropine (belladonna), digoxin (foxgloves)
examples of Fungi and bacteria used for drugs
penicillin, streptomycin
examples of animal tissue used for drugs
natural regulators
hormones
neurotransmitters
Types of drug action
main action, side action and toxic actions
main drug action (therapeutic effect)
the one that we want to use therapeutically or pharmacologically
side drug action (side effects)
these are undesirable effects in that particular application
toxic drug actions
these have an adverse effect on the subject and may lead to death
it can be a result of an overdose, or side actions or metabolic transformation
