Caffeine 咖
啡因 kā fēi yīn is an example of a stimulant 兴奋剂 xīng fèn jì.
Stimulants 兴奋剂
xīng fèn jì are also used as psycho-therapeutic
drugs 心理治疗药物 xīn lǐ zhì liáo yào wù
which can help excite the brain
脑
nǎo
and increase alertness 警觉
jǐng jué. Other examples of stimulants 兴奋剂
xīng fèn jì include, but are
not limited to, amphetamine 安
非他明 ān fēi tā míng
and cocaine 可卡因 kě kǎ
yīn.