Complex sentence: In an overdose, meprobamate tablets may form a gastric bezoar, requiring physical removal of the undissolved mass of tablets through an endoscope; therefore, administration of activated charcoal should be considered even after 4 or more hours or if levels are rising.
Split into simpler sentences: In an overdose, meprobamate tablets may form gastric bezoars, requiring physical removal of the undissolved mass of tablets through an endoscope. Meprobamate may cause GI concretions in overdose; therefore, charcoal should be considered even after 4 hours or if levels are rising.