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Stimulants are a class of drugs that enhance brain activity -
they cause an increase in alertness, attention, and energy that is accompanied
by increases in blood pressure, heart rate, and respiration.
Historically, stimulants were used to treat asthma and other
respiratory problems, obesity, neurological disorders, and a variety of other
ailments. As their potential for abuse and addiction became apparent, the use
of stimulants began to wane. Now, stimulants are prescribed for treating
only a few health conditions, including narcolepsy, attention-deficit
hyperactivity disorder (ADHD), and depression that has not responded to other
treatments. Stimulants may also be used for short-term treatment of obesity,
and for patients with asthma.
Stimulants such as dextroamphetamine (Dexedrine) and
methylphenidate (Ritalin) have chemical structures that are similar to key
brain neurotransmitters called monoamines, which include norepinephrine and
dopamine. Stimulants increase the levels of these chemicals in the brain and
body. This, in turn, increases blood pressure and heart rate, constricts blood
vessels, increases blood glucose, and opens up the pathways of the respiratory
system. In addition, the increase in dopamine is associated with a sense of
euphoria that can accompany the use of these drugs.
Research indicates that people with ADHD do not become addicted to
stimulant medications, such as Ritalin, when taken in the form prescribed and
at treatment dosages.5 However, when
misused, stimulants can be addictive.
The consequences of stimulant abuse can be extremely dangerous.
Taking high doses of a stimulant can result in an irregular heartbeat,
dangerously high body temperatures, and/or the potential for cardiovascular
failure or lethal seizures. Taking high doses of some stimulants repeatedly
over a short period of time can lead to hostility or feelings of paranoia in
some individuals.
Stimulants should not be mixed with antidepressants or
over-the-counter cold medicines containing decongestants. Anti-depressants may
enhance the effects of a stimulant, and stimulants in combination with
decongestants may cause blood pressure to become dangerously high or lead to
irregular heart rhythms.
Treatment of addiction to prescription stimulants, such as
methylphenidate and amphetamines, is based on behavioral therapies proven
effective for treating cocaine or methamphetamine addiction. At this time,
there are no proven medications for the treatment of stimulant addiction.
Antidepressants, however, may be used to manage the symptoms of depression that
can accompany early abstinence from stimulants.
Depending on the patient's situation, the first step in treating
prescription stimulant addiction may be to slowly decrease the drug's dose and
attempting to treat withdrawal symptoms. This process of detoxification could
then be followed with one of many behavioral therapies. Contingency management,
for example, uses a system that enables patients to earn vouchers for drug-free
urine tests; the vouchers can be exchanged for items that promote healthy
living. Cognitive-behavioral therapies are proving beneficial, and recovery
support groups may also be effective in conjunction with a behavioral
therapy.
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