Chitosan is a chitin derivative natural polymer compound isolated from aquaculture waste, such as a crab shell that is the most chitosan source. Nanocitosan as a drug delivery offers delivery with non-harmful routes such as oral, nose, eye, and absorption. Nanokitosan can be absorbed by human organs that have nano-sized membrane penetration capabilities such as the kidneys, liver, and lungs where nanoparticles are 1-1,000 nm in size. Chitosan nanoparticles are prepared by ionic gelation techniques. The mechanism of this method is the formation of chitosan nanoparticles based on the electrostatic interaction between the positive amine groups on chitosan (-NH2) with the negative charge group of polyanion tripolyphospate (TPP). The first step is the preparation of chitosan, crab shell waste which is smoothed to 60 mesh, after subsequent smrubination to be smoothed to remove the protein content by dissolved in 3 N NaOH, then crude chitin demineralized to eliminate the mineral content contained in the crab shell with the addition of HCl 1 N and the presence of heating and stirring. The chitin obtained then enters the deacetylation stage to remove the acetyl group present in the crab shell by adding 50% NaOH and carried out by heating and stirring. The chitosan obtained was then dissolved in 3% lactic acid to obtain liquid chitosan, then added NaTPP to reduce the chitosan particle size to nano size. The obtained nitrocitosan size is 688 nm distribution with variation of NaTPP addition of 0.1% concentration and stirring 60 minutes. The resulting nitocytosan is tested to increase the rate of blood clotting that has been shown to shorten blood clotting time by up to 30 seconds.