Here's what I memorized in school:
Adrenergics are drugs that stimulate or mimic the sympathetic nervous system. An example of an adrenergic is epinephrine (aka adrenaline).
lpha receptors are found in the A
rteries (vascular smooth muscle).
A person has 1
heart...where you will find beta 1
A person has 2
lungs...where you will find beta 2
If you agonize (agonist) a receptor, it will do more.
Antagonize (antagonist) it and it will do less. (think about this like the word antagonistic, if someone speaks to you in this manner you feel less)
Hemodynamics, electrolytes, acid-base balance, and all that good stuff was the hard part in nursing school. But it was also the best part!
With drugs it's a lot of memorization of what does what. But understanding WHY it's doing what it does is the hardest and most important part. Concentrate on understanding why
more than memorizing anything. Except you do need to memorize the alpha/beta, agonist/antagonist stuff above.
Hope I didn't confuse you.