Submitted by [deleted] t3_xxa73t in askscience
notcaffeinefree t1_irc8ri5 wrote
Reply to comment by penicilling in Why do some antihistamines make you sleepy? by [deleted]
They're both still H1 antagonists. Their exact method of action is slightly different, but they still target H1 receptors.
Both are listed as 2nd-gen:
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