Before going into some of the differences that exist between lorazepam and diazepam, the two drugs are usually classified as benzodiazepines and are mostly regarded as psychoactive drugs. Diazepam has a molecular formula of (C16H13CIN2O), whereas the molecular formula of lorazepam is (C15H10CL2N2O2).
Unlike Diazepam that is soluble in 25 mM of ethanol, Lorazepam dissolves readily in 40 mM of ethanol. Although both have certain advantages over each other, lorazepam is used mostly in the treatment of seizures and anxiety, whereas diazepam can treat panic attacks, insomnia, and anxiety.
Lorazepam has proven to be more effective than diazepam because it offers long-term benefits, as against diazepam, which gives quick results. When you consider the molecular strength of the two drugs, lorazepam is stronger than diazepam. Lorazepam can be injected and taken orally, but diazepam works faster when it is taken orally than when it is injected into the muscles.