Complex sentence: Lormetazepam and other benzodiazepine drugs act as positive modulators at the benzodiazepine receptor which in turn enhances the effect of the GABA receptor producing its therapeutic effects as well as adverse effects.
Split into simpler sentences: Lormetazepam and other benzodiazepine drugs act as positive modulators at the GABAa-benzodiazepine receptor complex. Lormetazepam binds to the benzodiazepine receptor which in turn enhances the effect of the GABAa receptor producing its therapeutic effects as well as adverse effects.