DRUG DESCRIPTION. ALPHAGANÂ® P (brimonidine tartrate ophthalmic solution) 0.1% or 0.15%, sterile, is a relatively selective alpha-2 adrenergic receptor agonist (topical intraocular pressure lowering agent).The structural formula of brimonidine tartrate is: 5-bromo-6-(2-imidazolidinylideneamino) quinoxaline L-tartrate; MW= 442.24.In solution, ALPHAGANÂ® P (brimonidine tartrate ophthalmic solution) has a clear, greenish-yellow color.rimonidine tartrate appears as an off-white to pale-yellow powder and is soluble in both water (0.6 mg/mL) and in the product vehicle (1.4 mg/mL) at pH 7.7.
Siren (noun). a sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived. Odysseus ordered his crew to plug their ears so they would not hear the Siren's fatal song. enchantress, temptress, siren, Delilah, femme fatale (noun).
1 (original sense) (Greek mythology) One of a group of nymphs who lured mariners to their death on the rocks.  A device, either mechanical or electronic, that makes a piercingly loud sound as an alarm or signal, or the sound from such a device.