The present invention discloses pyridoindolobenzox- and thiazepine compositions of Formula 1, wherein A is —CH(R9)—X—, —XCH(R9)—; —CO—X— or —X—CO—; X is —O—, —S—, —SO—, or —SO2—. Y is a single bond or a double bond. D and E are independently —(CH2)n—; and ‘n’ varies from 0 to 2. R1 to R9 are various electron donating, electron withdrawing, hydrophilic, or lipophilic groups selected to optimize the physicochemical and biological properties of compounds of Formula I.