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The aim of this study is to apply 3D printing technology to hospital drug dosing operations, and explore its feasibility and scalability. Drugs often dosed in hospitals are selected as models. The commercially available drug was ground into powder, diluted with medicinal excipients and then mixed with 75% ethanol and binder to prepare a paste for 3D printing. The dose and physicochemical properties of divided tablets were controlled by setting print parameters and printing models in computer software. Different 3D printers were employed to evaluate the impact of the device on the dosing tablet. Two drugs were dosed in this study to explore the scalability of 3D printing technology between different drugs. The drug content of the three divided dose tablets (warfarin sodium 1 mg, 2 mg, hydrochlorothiazide 5 mg) was 1.02±0.03, 1.96±0.01, 5.19±0.06 mg. The content uniformity was 1.0, 5.3, 2.6, respectively. The drug dissolution rate was (99.3±1.2)%, (101.5±0.3)%, (98.1±0.8)% in 45, 45 and 30 min. The mechanical properties of the three sub-doses and the stability within 30 days were in line with the Chinese Pharmacopoeia (2015) requirements. At the same time, it was found that the printing parameters and prescriptions can affect the properties of the divided dose tablets. By controlling the dilution ratio of commercial drug and printing parameters, the drug release rate can be customized to achieve individualized treatment. Both different modes of 3D printers can produce qualified sub-doses, and 3D print dispensing technology was also versatile between the two drugs. 3D printing can prepare small-volume, high-precision, high-repetition dosing tablets, with all properties in compliance with pharmacopoeia regulations. Thus, this method can be used as a new and scalable sub-dosing method.
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OBJECTIVE:To observe clinical efficacy and safety of rivaroxaban in the treatment of pulmonary embolism. METHODS:100 patients with pulmonary embolism were selected and randomly divided into observation group and control group, with 50 cases in each group. Both groups were given nursing intervention for rehabilitation. Observation group was treated with riva-roxaban 15 mg,bid,for consecutive 3 weeks,3 weeks later adjusting to 20 mg,qd;control group was given low molecular weight heparin 1 mg/kg,bid,combined with warfarin sodium 5 mg,qd,for more than 5 days,stopped taking low molecular weight heparin until the INR reached the target 2-3 and given warfarin alone orally. Treatment course of 2 groups lasted for 3 months. Clinical efficacy of 2 groups were observed,and PaO2,PaCO2 and D-dimer levels were observed in 2 groups before and af-ter treatment;the improvement of clinical symptoms as cough,pectoralgia,dyspnea,and the incidence of ADR were recorded in 2 groups. RESULTS:The total effective rate of observation group (90.0%) was significantly higher than that of control group (74.0%),with statistical significance(P<0.05). After treatment,PaO2,PaCO2 and D-dimer levels of 2 groups were increased signif-icantly,compared with before treatment;the observation group was higher than the control group,with statistical significance(P<0.05). The remission rate of clinical symptoms as cough,pectoralgia,dyspnea in observation group was significantly higher than in control group,with statistical significance (P<0.05). The incidence of ADR in observation group (12.0%) was significantly lower than in control group (30.0%),with statistical significance (P<0.05). CONCLUSIONS:Rivaroxaban supplemented by reasonable nursing intervention can effectively improve clinical efficacy of patients with pulmonary embolism with low incidence of ADR.
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Objective: To study the anticoagulant effect of Shunaoxin Dropping Pill (SDP) alone or in combination with Warfarin sodium on platelet aggregation and provide the experimental support for the clinical safety of medication. Methods: Experiments were carried out in control group, low-dose SDP group, high-dose SDP group (45.36 and 90.72 mg/kg), and Warfarin sodium (clinical equivalent dose 0.4 mg/kg) group, Combined administration with low-dose SDP and high-dose SDP groups+clinical equivalent dose of Warfarin sodium. We determined the platelet aggregation rate of rats in the control group, low-dose SDP group, and high-dose SDP group in vitro by turbidimetry. We made iac administration of SDP and Warfarin sodium for 3 d, and took abdominal aortic blood for separating the platelets and used nephelometry for determining platelet aggregation rate; We separated serum and used semi-automatic coagulation analyzer to test APTT, PT, and TT. Results: Compared with the control group, SDP had the strong anti-platelet aggregation in vitro and could inhibit the increase of platelet aggregation in vivo slightly with the dose increasing. SDP could prolong APTT, PT, and PT; Compared with the single drug group, the combination therapy had no obvious effect on the platelet aggregation but could significantly extend the APTT, PT, and TT. Conclusion: SDP has some inhibition on platelet aggregation with anticoagulant effect; Combined with Warfarin sodium, SDP has a synergistic interaction on anticoagulant effect with Warfarin sodium.
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Arsenic contamination in groundwater is a global health challenge. A large number of people worldwide are affected by arsenic poisoning. Paracetamol is a widely used analgesic-antipyretic drug. Effect of arsenic on paracetamol binding to protein has been investigated using two site specific probes and equilibrium dialysis method was used for the experiment. In absence of any site specific probes free concentration of paracetamol bound to bovine serum albumin increased from 3.95 ± 1.164% to 25.36 ± 1.164%. In presence of site-I specific probe warfarin sodium the % release of drug was steady at around 14%. But in presence of site-II specific probe an increment of free drug concen-tration was observed from 14.38 ± 1.164% to 54.72 ± 1.552%. Thus it can be assumed that the free concentration of paracetamol was increased to a greater extent in presence of arsenic and probably arsenic bound to site-II of BSA. Thus arsenic may displace paracetamol by binding with high affinity binding site, site-II in the BSA and probably arsenic has little effect to site-I.
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Arsenic contamination in groundwater is a global health challenge. A large number of people worldwide are affected by arsenic poisoning. Paracetamol is a widely used analgesic-antipyretic drug. Effect of arsenic on paracetamol binding to protein has been investigated using two site specific probes and equilibrium dialysis method was used for the experiment. In absence of any site specific probes free concentration of paracetamol bound to bovine serum albumin increased from 3.95 ± 1.164% to 25.36 ± 1.164%. In presence of site-I specific probe warfarin sodium the % release of drug was steady at around 14%. But in presence of site-II specific probe an increment of free drug concen-tration was observed from 14.38 ± 1.164% to 54.72 ± 1.552%. Thus it can be assumed that the free concentration of paracetamol was increased to a greater extent in presence of arsenic and probably arsenic bound to site-II of BSA. Thus arsenic may displace paracetamol by binding with high affinity binding site, site-II in the BSA and probably arsenic has little effect to site-I.
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0.01).The dissolution of tablets from A and D manufacturers were same to each other while both of them were larger than those from B and C manufacture.CONCLUSIONS:The qualities of Warfarin sodium tablets from four manufacturers are different from one another.The quality of products from A and D manufacturers are superior to those from manufacturer B.The products from manufacturer C are the worst.
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OBJECTIVE:To prepare warfarin sodium granules(WSG)and to establish it’s quality control methods .METHO_DS:To prepare WSG with part.aeq.geometric method,to optimize the amounts of all sorts of agents in the formulation in terms of dissolution time and abilityof WSG by orthogonal experiment.To determin the content of WS by UV. RESULTS:The formulation was designed and optimized,the WSG’s size were evenly.The concentration of WS was linear within the range of 5.92～17.86?g/ml with r=0.9 998(n=7),the average recovery rate was 101.26%～101.84%(n=5)with the RSD lower than 1.0%.The solution dissolved by granules is stable within 10 days.CONCLUSIONS:The preparation method is simple and feasible,the content determination methods is accurate,realible and sensitive,suitable for the quality control of WSG.The dissolved solution can be divided in accurate doses.