As mannitol has a brittle fracture nature, new "unlubricated" surfaces are created during compaction which gives higher and robust tablet strength. However, this potentially also leads to higher ejection forces. From our studies, a minimum amount of 1.2% lubricant (e.g., magnesium stearate) is sufficient to lower the ejection force to about 150 N to 300 N depending on the compression force and tablet shape/size.