Patent ID: 7045543

Claim:
A pharmaceutical composition comprising: a) a psychotropic, neurotropic or neurological drug, or an antibiotic, antibacterial, antimycotic, antiviral, antiproliferative or antineoplastic drug, wherein the drug is L-dopa, hydroxytryptamine, amantadine, benztropine, bromocryptine, diphenhydramine, levadopa, pergolid, trihexphenidyl, ethosuximide, valproic acid, carbamazepine, 10-hydroxycarbamazepine, 11-hydroxycarbamazepine, primidone, gabapentin, lamotrigine, felbamate, paramethadione, trimethadione, phenothiazine, thioxantheme, clozapine, haldoperidol, loxapine, a benzodiazapene antidepressant of the norepinephrine reuptake inhibitor type, a monoamine oxidase inhibitor, carotene, glutathione, N-acetylcysteine, methotrexate, azidothymidine, dideoxyinosine, dideoxycytosine, acyclovir, or gancyclovir; b) 5-hydroxytryptophan, serotonin, or melatonin; and c) a spacer having a first linker functional group and a second linker functional group, wherein the spacer has a first end and a second end and wherein 5-hydroxytryptophan, serotonin, or melatonin is attached to the first end of the spacer through the first linker functional group and the drug is attached to the second end of the spacer through the second linker functional group.