Atropine is an alkaloid originally synthesized from Atropa belladonna. It is a racemic mixture of d-and l-hyoscyamine, of which only l-hyoscyamine is pharmacologically active.[A251670,L42835] Atropine is generally available as a sulfate salt and can be admini…

Hyoscyamine is a tropane alkaloid and the levo-isomer of [atropine].[A228423] It is commonly extracted from plants in the _Solanaceae_ or nightshade family.[A228423] Research into the action of hyoscyamine in published literature dates back to 1826.[A228713] …

Scopolamine is a tropane alkaloid isolated from members of the _Solanaceae_ family of plants, similar to [atropine] and [hyoscyamine], all of which structurally mimic the natural neurotransmitter [acetylcholine].[A228423, A228763] Scopolamine was first synthe…