Research Letter

The Cold Contact Method as a Simple Drug Interaction Detection System

Figure 2

(a) The contact area of methampyrone-phenylbutazon indicated peritecticum mixture: (1) before heating, (2) phenylbutazon melted at 105ºC, (3) contact area-1 melted at 119ºC, (4) contact area-2 melted at 140ºC, (5) contact area-3 melted at 150ºC, and (6) methampyron melted followed by oxidation at 220–230ºC. (b) DSC data of phenylbutazon (top), methampyrone (middle), and the mixture of methampyrone-phenybutazon 7 : 3 weight ratio.
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