Ion channel blockers

Tuaminoheptane (, ; brand names Heptin, Heptadrine, Tuamine; also known as tuamine and 2-aminoheptane) is a sympathomimetic agent and vasoconstrictor which is used as a nasal decongestant. It has also been used as a stimulant.

Tetrahydropalmatine (THP) is an isoquinoline alkaloid found in several different plant species, mainly in the genus Corydalis (Yan Hu Suo), but also in other plants such as Stephania rotunda. These plants have traditional uses in Chinese herbal medicine. The pharmaceutical industry has synthetically produced the more potent enantiomer Levo-tetrahydropalmatine (Levo-THP; technically l-THP, often written L-THP), which has been marketed worldwide under different brand names as an alternative to anxiolytic and sedative drugs of the benzodiazepine group and analgesics such as opiates. It is also so