– Tuaminoheptane is a sympathomimetic and vasoconstrictor that was once used as a nasal decongestant. It works by inhibiting and accelerating the release of norepinephrine, a mechanism that likely underpins its decongestant and stimulating effects. Unlike other norepinephrine-releasing agents such as phenethylamines, Tuaminoheptane’s chemical structure lacks an aromatic ring. Additionally, it acts as a skin irritant and may cause contact dermatitis by inhibiting volume-regulated cation channels, which limits its utility as a decongestant.