Drug interactions

When a drug is administered, a response occurs; if a second drug is given and the response to the first drug is altered, a drug interaction is said to have occurred.36 A drug interaction may be desired or undesired, i.e. beneficial or harmful. It is deliberately sought in multidrug treatment of tuberculosis and when naloxone is given to treat morphine overdose. It is an embarrassment when a woman taking a combined oestrogen/progestogen oral contraceptive for a desired interaction is prescribed a drug that is a metabolic enzyme inducer, with the result that she becomes pregnant. Although dramatic unintended interactions attract most attention and are the principal subject of this section they should not distract attention from the many therapeutically useful interactions that are the basis of rational polypharmacy. These useful interactions are referred to throughout the book whenever it is relevant to do so.

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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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