摘要:
The present invention relates to the use of uncrosslinked copolymers having a backbone comprising i) a plurality of thermo-responsive structural units derived from one or more than one N-alkyl or N,N-dialkyl substituted (alkyl)acrylamide monomer and ii) a plurality of hydrophilic structural units derived from one or more than one second ethylenically unsaturated monomer as excipients in solid mixtures with poorly water-soluble substances for effective solubilization of the latter in aqueous media. Solid dosage forms comprising a solid mixture of such copolymer(s) and poorly water-soluble substance(s) are also within the scope of the invention.
摘要:
Esterified cellulose ethers comprising groups of formula —C(O)—CHR′—CHR″—COOA, wherein, R′ and R″ are hydrogen or (—S)m(—R1)n-R2, wherein R1 is a hydrocarbon group having 1 to 4 carbon atoms, R2 is an optionally substituted 5- or 6-membered cyclic group, m and n each independently are 0 or 1, and A is hydrogen or a cation, with the proviso that in each group CHR′—CHR″ one of R′ and R″ is hydrogen and the other one is (—S)m(—R1)n-R2, are useful as excipients for maintaining the concentration of poorly water-soluble drugs in aqueous liquids at supersaturation levels.
摘要:
Esterified cellulose ethers which comprise (i) aliphatic monovalent acyl groups or (ii) groups of the formula —C(O)—R—COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, or (iii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, which have a viscosity of up to 2.33 mPa·s, measured as a 2.0 wt % solution of the esterified cellulose ether in 0.43 wt % aqueous NaOH at 20° C., and which have a viscosity of up to 13 mPao·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C. are useful for preparing solid dispersions comprising drugs.
摘要:
A solid dispersion comprising at least one active ingredient in at least one hydroxyalkyl methylcellulose having a DS of from 1.0 to 2.7 and an MS of from 0.40 to 1.30, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxyalkoxyl groups, can be produced by extrusion or spray-drying.
摘要:
A solid dispersion comprising at least one active ingredient in at least one hydroxyalkyl methylcellulose having a DS of from 1.0 to 2.7 and an MS of from 0.40 to 1.30, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxyalkoxyl groups, can be produced by extrusion or spray-drying.
摘要:
Esterified cellulose ethers which comprise (i) aliphatic monovalent acyl groups or (ii) groups of the formula —C(O)—R—COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, or (iii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, which have a viscosity of up to 2.33 mPa·s, measured as a 2.0 wt % solution of the esterified cellulose ether in 0.43 wt % aqueous NaOH at 20° C., and which have a viscosity of up to 13 mPao·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C. are useful for preparing solid dispersions comprising drugs.