This pill cutter is suitable for precisely cutting approximately 95% of tablets. However, about 5% of tablets made from fragile materials may crumble during cutting. Additionally, some harder tablets might break if not properly secured during the cutting process, especially those with low adhesion properties. These are inherent limitations of blade-type pill cutters that cannot be completely avoided. If your particular tablets are unsuitable for cutting, we recommend: Using the built-in crushing function to pulverize the tablets first, then dividing them into your required doses; or contacting Amazon to initiate a return/refund process