A composition comprising ester-terminated dimer acid-based polyamide (ETDABP) and at least one bioactive agent, the composition having a consistency of a gel, wherein the bioactive agent is selected from the group consisting of acetylsalicylic acid, acyclovir, 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid, amphotericin B, ascorbic acid, benzoyl peroxide, betamethasone valerate, chloroxylenol, citric acid, clindamycin phosphate, clobetasol propionate, clotrimazole, cyproheptadine, diclofenac, diphenylhydramine hydrochloride, econazole, erthromycin, estradiol, glycolic acid, glycyrrhetinic acid, hydrocortisone, hydroquinone, ibuprofen, ketoconazole, kojic acid, lactic acid, lidocaine hydrochloride, metronidazole, miconazole, miconazole nitrate, octopirox, 5-n-octanoylsalicylic acid, paracetamol, pramoxine hydrochloride, progesterone, retinoic acid, retinol, salicylic acid, superoxide dismutases, terbinafine, thenaldine, α-tocopherol, tolnaftate, trimeprazine, 1,8,10-tripropionyl-9-anthrone, undecylenate, and vitamin D.