Diazepam, first marketed as Valium, is a medicine of the benzodiazepine family that typically . Intravenous diazepam or lorazepam are first-line treatments for status . Diazepam has a range of side effects common to most benzodiazepines, .. of diazepam modulates the dopamine system in similar ways to how morphine Elimination half-life?: ?20– hours (36– ho. Nov 8, - What are the side effects of Dilaudid vs. fentanyl? . mg to mg per dose given by intramuscular injection or by intravenous injection. for example, diazepam (Valium), lorazepam (Ativan), and zolpidem (Ambien), certain. Fentanyl is probably superior to morphine because it acts more quickly, has no active Other side effects of opiates include respiratory depression, decreases in blood pressure (well Midazolam, lorazepam, and diazepam can be given IV.