Molecular target
H1 Histamine Receptor
Histamine receptor mediating allergic / inflammatory and CNS effects. First-generation H1 antagonists (diphenhydramine, hydroxyzine) cross the blood-brain barrier and produce sedation; second-generation agents (loratadine, cetirizine) are peripherally restricted.
Educational use only. This page summarizes published research and traditional-use records for educational purposes. It does not diagnose, treat, cure, or prevent any disease. Do not start, stop, or change medications based on this information. Discuss any decisions about therapies — pharmaceutical or botanical — with a qualified clinician who knows your medical history.
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Pharmaceutical agents
Drugs that act on H1 Histamine Receptor
These medications have H1 Histamine Receptor among their molecular targets. Sharing a target is a mechanistic relationship — it does not make any plant below an alternative to, or substitute for, these drugs.
Botanical connections
Plants whose compounds act on H1 Histamine Receptor
Each plant below contains a named compound documented to act on H1 Histamine Receptor. The compound and the reason for the connection are shown on every edge — a shared mechanism, not a therapeutic equivalence.
- QuercetinFlavonol
Beyond mast-cell stabilization and H1 antagonism, quercetin is a broadly characterized protein/receptor tyrosine-kinase modulator (including JAK/STAT) investigated in preclinical models. Research only — not a treatment claim.