Fill in each gap with one suitable word in the box:
alike - dose - like - As a result - extent - prescribe - beneficial - fortunately - relief - circulate -
harmful - sensation - create - include

All drugs
can affect the
body in both
helpful and __________(1) ways. For example, a particular drug may produce a stronger heartbeat,
____________(2) from pain, or some other desired effect. But that drug , ___________(3) any other drug,
can also cause undesired effects- especially if the _______(4) is too large. Such effects minght_______(5)
.ever, high blood pressure, or constipation.
Most drugs produce changes throughout the body because the drugs ____________(6) through the
blood stream. __________(7) most drugs used to affect one part of the body also affect other parts. For
example, physicians sometimes _____________98) morphine to relieve pain. Morphine depresses the
activities of cells in the brain and thus reduces the ___________(9) of pain . But morphine also alters the
function of cells elsewhere in the body. It may decrease the rate of breathing, produce constipation, and
_________(10) other undesired effects.