It is evident from the way this book is organised that there is no homogeneous system for classifying drugs that suits the purpose of every user. Drugs are commonly categorised according to the convenience of who is discussing them: clinicians, pharmacologists or medicinal chemists.

Drugs may be classified by:

• Body system, e.g. alimentary, cardiovascular

• Therapeutic use, e.g. receptor blockers, enzyme inhibitors, carrier molecules, ion channels

— molecular interaction, e.g. glucoside, alkaloid, steroid.

— cellular site, e.g. loop diuretic, catecholamine uptake inhibitor (imipramine)

• Molecular structure, e.g. glycoside, alkaloid, steroid.1

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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