Abstract: A condom having a surface lubricated with an antiviral lubricous composition that contains carrageenan, at least one polyol selected from glycerol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, xylitol sorbitol, erythritol, isomalt, lactitol, maltitol, mannitol, polyethylene glycol, polypropylene glycol, one or more pH-adjusting agents that include at least one organic acid and its conjugate base, water, and, optionally, one or more of a sweetener, a preservative, a zinc salt, and a spermicide. At least 80% of the carrageenan is lambda-carrageenan, with the remainder being one or both of kappa-carrageenan and iota-carrageenan. The antiviral lubricous composition is an aqueous homogeneous solution having a turbidity less than or equal to about 25 Nephelometric Turbidity Units (NTU), a pH of from about 3.5 to about 8.0, a viscosity of from about 500 cP to about 10,000 cP, and an osmolality of from about 250 mOsmol/kg to about 1,200 mOsmol/kg.

Abstract: A pourable, non-toxic lubricating composition containing lambda carrageenan as an antiviral agent, for protection from viruses, including but not limited to sexually-transmitted viruses and respiratory viruses, and methods of using the lubricating compositions as a non-oily, pseudoplastic lubrication product and administering the carrageenan for reducing the propagation of sexually-transmitted viruses, including HPV, during sexual activity.