摘要:
Bioerodible, thermoset, covalently crosslinked, elastomeric poly(ortho ester)s are disclosed. These materials are comprised of polymer chains that are interlocked in a covalent, three dimensional network which imparts dimensional stability. Use of these thermoset, covalently crosslinked materials as a drug delivery device is also disclosed.
摘要:
The instant invention relates to a drug-delivery device for the controlled release of HMG-CoA reductase inhibitor salts, as the therapeutically active ingredient, into an environment of use which comprises:(A) a core composition comprising(1) a water insoluble, non-diffusible, charged resin entity, and(2) a diffusible, water soluble ionizable therapeutically active HMG-CoA reductase inhibitor salt carrying the same charge as said resin entity; and(B) an imperforate water insoluble wall surrounding said core composition and prepared from a semipermeable material substantially impermeable to core composition and permeable to the passage of an external fluid in the environment of use, with said wall having a means for release of the therapeutic agent through the water insoluble wall; or(C) a water insoluble wall surrounding said core composition and prepared from (1) a polymer material that is permeable to water but substantially impermeable to solute and (2) 0.1 to 75% by weight, based on the total weight of (1) and (2), of at least one water leachable pore forming additive dispersed throughout said wall.
摘要:
Polymers obtained by condensing polyols with divinyl orthocarbonates are useful for making bioerodible polymers for sustained release of beneficial agents.
摘要:
Bioerodible, thermoset, covalently crosslinked, elastomeric poly(ortho ester)s are disclosed. These materials are comprised of polymer chains that are interlocked in a covalent, three dimensional network which imparts dimensional stability. Use of these thermoset, covalently crosslinked materials as a drug delivery device is also disclosed.
摘要:
The invention relates to the use of carboxylic acids incorporated as a catalyst in poly(orthoester)s and other acid labile polymers such that upon exposure to aqueous environments the acid catalyzes the erosion of the polymer matrix. The rate of release of a drug substance incorporated into or surrounded by the poly(orthoester) or other acid labile polymer can be controlled in that the drug is released as the polymer is eroded in response to the catalytic action of the acid incorporated therein.
摘要:
Certain novel cyclic ureas are disclosed herein as dermal penetration enhancers of drug absorption. Also disclosed herein are compositions, methods of treatment and processes for preparing said cyclic urea compounds.
摘要:
The instant invention is directed to a bioerodible poly(ortho ester) thermoplastic elastomer prepared from:(A) a diketene diacetal;(B) a long-chain non-polar, flexible diol containing 4 to 22 carbon atoms; and(C) a diol selected from the group consisting of:(i) diols containing at least one functional group which produces hydrogen bonding or other association, and(ii) rigid symmetrical diols.
摘要:
Novel, transient inotropic prodrug forms of the N-(2-phenylethyl)-.omega.-phenylalkylamines, notably of dobutamine, have (i) the structural formula (I): ##STR1## with the proviso that at least one R.sup.1, R.sup.2 or OR.sup.1, when R.sup.7 and/or R.sup.10 is OR.sup.1, must be R.sup.3 COXCH(R.sup.4)-- or R.sup.3 COXCH(R.sup.4)O--, respectively.
摘要:
Novel, transient prodrug forms of dopa and dopamine have (i) the structural formula (I): ##STR1## wherein each R is independently selected from the group consisting of hydrogen, R.sup.3 -CO- and ##STR2## wherein X is O, S or NR.sup.6 ; R.sup.1 is hydrogen or --COOR.sup.8 ; R.sup.2 is hydrogen or OR; R.sup.3 is selected from the group consisting of straight or branched chain alkyl having from 1 to 20 carbon atoms; aryl having from 6 to 10 carbon atoms; cycloalkyl having from 3 to 8 carbon atoms; alkenyl having from 2 to 20 carbon atoms; cycloalkenyl having from 4 to 8 carbon atoms; alkynyl having from 2 to 20 carbon atoms; aralkyl, alkaryl, aralkenyl, aralkynyl, alkenylaryl, alkynylaryl, loweracyloxyalkyl, and carboxyalkyl, wherein alkyl, aryl, alkenyl and alkynyl are as defined above; saturated or unsaturated monoheterocyclic or polyheterocyclic, or fused heterocyclic, containing from 1 to 3 of any one or more of the hetero atom N, S or O in each heterocyclic ring thereof and each such ring being from 3- to 8-membered; and mono- or poly-substituted derivatives of the above, each of said substituents being selected from the group consisting of lower alkyl, lower alkoxy, lower acyl, lower acyloxy, halo, haloloweralkyl, cyano, lower alkoxycarbonyl, loweralkylthio, amino, nitro, loweralkylamino, diloweralkylamino, carboxyl, carbamyl, loweralkylcarbamyl, diloweralkylcarbamyl and ##STR3## wherein R.sup.5 is hydrogen or alkyl having from 1 to 10 carbons; R.sup.4 is hydrogen, R.sup.3, lower acyl, cyano, haloloweralkyl, carbamyl, loweralkylcarbamyl, diloweralkylcarbamyl, --CH.sub.2 ONO.sub.2 and --CH.sub.2 OCOR.sup.3 ; R.sup.6 is hydrogen or lower alkyl; R.sup.7 is hydrogen, lower alkyl, COCF.sub.3, COOC(CH.sub.3).sub.3, COOCH.sub.2 C.sub.6 H.sub.5, or other N-protective group conventional to amino acid acid chemistry; R.sup.8 is hydrogen, benzyl, or other conventional, cleavable carboxyl protective group; with the proviso that at least one R must be R.sup.3 COXCH(R.sup.4)--; (ii) the structural formula (I) wherein at least one R.sup.3 CO- moiety comprising at least one R group is the residue of any naturally occurring protein amino acid, the residue of any N-substituted naturally occurring amino acid, which N-substituent is lower alkyl or any amino acid protective group cleavable via hydrogenolysis or hydrolysis, or the residue of an N,N-lower dialkyl or C.sub.4 -C.sub.7 cycloalkylamino acid; and (ii) the non-toxic, pharmaceutically acceptable salts thereof.
摘要:
This invention involves complexes of quinoline carboxylic acid derivatives with guanidine and guanidine carbonate. The complexes have a greater solubility and dissolution rate when compared to the parent quinoline carboxylic acid derivatives and thus are more effective anti bacterials than the parent acids.