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

Constipation Prescription

Constipation Prescription

Did you ever think feeling angry and irritable could be a symptom of constipation? A horrible fullness and pressing sharp pains against the bladders can’t help but affect your mood. Sometimes you just want everyone to leave you alone and sleep to escape the pain. It is virtually impossible to be constipated and keep a sunny disposition. Follow the steps in this guide to alleviate constipation and lead a happier healthy life.

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