Let’s Talk About RITALIN® hydrochloride, methylphenidate hydrochloride USP, which is a mild central nervous system (CNS) stimulant, available as tablets of 5, 10, and 30 mg for oral administration; Ritalin-SR is available as sustained-release tablets of 30 mg for oral administration. Methylphenidate hydrochloride is methyl α-phenyl-2-piperidineacetate hydrochloride, and its structural formula is
Methylphenidate hydrochloride USP is a white, odorless, fine crystalline powder. RITALINsolutions are acid to litmus. It is freely soluble in water and in methanol, soluble in alcohol, and slightly soluble in chloroform and in acetone. Its molecular weight is 269.77.
Inactive Ingredients. Ritalin tablets: D&C Yellow No. 10 (5-mg and 30-mg tablets), FD&C Green No. 3 (10-mg tablets), lactose, magnesium stearate, polyethylene glycol, starch (5-mg and 10-mg tablets), sucrose, talc, and tragacanth (30-mg tablets).
Ritalin-SR tablets: Cellulose compounds, cetostearyl alcohol, lactose, magnesium stearate, mineral oil, povidone, titanium dioxide, and zein.