SummaryThe rate of diffusion of pyrimethamine, a pyrimidine-based antimalarial drug, from silicone rubber is compared to the diffusion of this drug from a flexible epoxy. Specific amounts of drug were mixed into the epoxy resin prior to the addition of an aliphatic diamine curing agent in the reparation of the epoxy-drug capsules and into the silicone rubber prior to vulcanization with stannous octoate in the preparation of silicone drug capsules. These capsules, in the form of discs, were separately immersed…
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