How drugs get into, are distributed, and do their job in the body

enzymes

The enzymes are helpful to targeting to
area that the drug is intended for

The enzymes may not be helpful in the liver
as the enzymes produced in the liver may
be destroyed by them

fat

Fat in the bloodstream may be a
barrier to the drug getting to the
targeted area as it may hijack the
drug molecules

cells

The cells soak up the drug and
the drug does what it is intended
to do ex. relieve pain

protein

Protein can hijack the drug molecule which
prevents the drug from going where it is
intended to go

receptors

Side effects can happen when the drug molecules
bind to receptors that are not the intended
target

The drugs know where to go when the receptors
that target the organ latch onto the drug
molecules

circulatory

the drug travels to the liver and to the targeted
area through the circulatory system.

stomach and stomach acid

The drug is dissolved in the stomach by the
stomach acid. The stomach lining absorbs the
drug into the bloodstream

The stomach however may destroy the drug as
a result. This is when the drug is chosen to be
administered through inhalation or injection

The drug also has to to a small enough molecule
to be absorbed by the stomach lining

liver

When the drug has entered the bloodstream
it travels to the liver where it could possibly be
destroyed by the enzymes produced. This
is when another method of getting drugs to the
targeted area

small intestine

If the drug is not fully absorbed in the
stomach, it moves to the small intestine
to finish dissolving

The drug molecules have to be small enough
to be absorbed through the intestine lining