ASIMIATM (paroxetine mesylate) is an orally administered psychotropic drug with a chemical structure related to paroxetine hydrochloride (Paxil®). It is the mesylate salt of a phenylpiperidine compound identified chemically as (-)-trans -4R- (4' - fluorophenyl) - 3S - [(3', 4-methylenedioxyphenoxy) methyl] piperidine mesylate and has the empirical formula of C 19H20FNO3 CH3SO3H. The molecular weight is 425.5 (329.4 as free base). The structural formula is:

Parlodel® (bromocriptine mesylate) is an ergot derivative with potent dopamine receptor agonist activity. Each Parlodel® (bromocriptine mesylate) SnapTabs® tablet for oral administration contains 2? mg and each capsule contains 5 mg bromocriptine (as the mesylate). Bromocriptine mesylate is chemically designated as Ergotaman-3',6',18-trione, 2-bromo-12'-hydroxy-2'-(1-methylethyl)-5'-(2-methylpropyl)-, (5'?)-monomethanesulfonate (salt).

FACTIVE (gemifloxacin mesylate) is a synthetic broad-spectrum antibacterial agent for oral administration. Gemifloxacin, a compound related to the fluoroquinolone class of antibiotics, is available as the mesylate salt in the sesquihydrate form. Chemically, gemifloxacin is (R,S)-7[(4Z)-3-(aminomethyl)-4-(methoxyimino)-1-pyrrolidinyl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo1,8-naphthyridine-3-carboxylic acid.

Benztropine mesylate is a synthetic compound containing structural features found in atropine and diphenhydramine.

TEVETEN® HCT 600/12.5 mg and TEVETEN® HCT 600/25 mg (eprosartan mesylate-hydrochlorothiazide) combine an angiotensin II receptor (AT1 subtype) antagonist and a diuretic, hydrochlorothiazide. TEVETEN® (eprosartan mesylate) is a non-biphenyl non-tetrazole angiotensin II receptor (AT1) antagonist. A selective non-peptide molecule, TEVETEN® is chemically described as the monomethanesulfonate of (E)-2-butyl-1-(pcarboxybenzyl)-?-2-thienylmethylimidazole-5-acrylic acid. Its empirical formula is C23H24N2O4S•ECH4O3S and molecular weight is 520.625. Its structural formula is:

CYCLOSET Tablets contain bromocriptine mesylate, a dopamine receptor agonist. Bromocriptine mesylate is chemically designated [Ergotaman-3',6',18-trione, 2-bromo-12'-hydroxy-2'-(1-methylethyl)-5'-(2-methylpropyl)-, monomethanesulfonate (salt), (5'?)-]. CYCLOSET (bromocriptine mesylate tablets) is a single enantiomer with absolute configuration 5R, 8R, 2'R, 5'S, 11'S, 12'S. The structural formula of bromocriptine is shown below:

ANZEMET (dolasetron mesylate) is an antinauseant and antiemetic agent. Chemically, dolasetron mesylate is (2?,6?,8?,9a?)-octahydro-3-oxo-2,6-methano-2H-quinolizin-8-yl-lH- indole-3-carboxylate monomethanesulfonate, monohydrate. It is a highly specific and selective serotonin subtype 3 (5-HT3) receptor antagonist both in vitro and in vivo. Dolasetron mesylate has the following structural formula:

Permax (Pergolide Mesylate) is an ergot derivative dopamine receptor agonist at both D1 and D2 receptor sites. Pergolide mesylate is chemically designated as 8B-[(Methylthio)methyl]-6-propylergoline monomethanesulfonate.

Imatinib is a small molecule kinase inhibitor. Gleevec film-coated tablets contain imatinib mesylate equivalent to 100 mg or 400 mg of imatinib free base. Imatinib mesylate is designated chemically as 4-[(4-Methyl1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]-phenyl]benzamide methanesulfonate and its structural formula is

Migranal (dihydroergotamine mesylate spray) ® is ergotamine hydrogenated in the 9,10 position as the mesylate salt. Migranal (dihydroergotamine mesylate spray) ® is known chemically as ergotaman-3', 6', 18-trione, 9,10-dihydro-12'-hydroxy-2'-methyl-5'- (phenylmethyl)-, (5'?)-, monomethanesulfonate. Its molecular weight is 679.80 and its empirical formula is C33H37N5O5•CH4O3S.