Intramuscular chloroquine is rapidly absorbed, even in severe falciparum malaria, and may cause potentially lethal hypotension. Less rapidly absorbed formulations should be safer. A chloroquine phosphate solution containing 2% methylcellulose 1500 released chloroquine 2.6 times more slowly than a commercial aqueous solution in an in-vitro absorption simulator. There was a log linear relationship between viscosity and release rate. The absorption pharmacokinetics of the more viscous chloroquin...Expand abstract
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An improved formulation of chloroquine for intramuscular administration: absorption kinetics in rabbits.
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