<span>Inhalants are addictive, and may cause immediate brain damage, constipation and nausea. While amphetamines do not cause any such harm. Amphetamines are used as a stimulant of the central nervous system.</span>
It depends on which drug is to be given and what is its mechanism of action. e.g. for any antibiotic intra venous route will be a suitable choice whereas in case of a laxative we can administer it rectally if oral is not tolerated.
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