Nov 8, - Dilaudid (hydromorphone) vs. fentanyl quick comparison of . Injections: Give 1 to 2 mg intramuscularly or subcutaneously every 2 to 3 hours as needed. for example, diazepam (Valium), lorazepam (Ativan), and zolpidem. Feb 2, - Dilaudid For Pain And Drug Comparisons; 8. . Dilaudid Injection: Administer 2 mg under the skin or into the muscle every four to six hours as needed for pain. Sedative use, such as Valium, Xanax or diazepam; Liver or kidney . Whether you are using rectal hydromorphone with a doctor's orders or. Oct 10, - Ativan Injection should not be used during pregnancy. of the patient, in order to avoid over sedation or neurological impairment. .. Each mg, 1 mg and 2 mg Ativan Sublingual tablet contains: . on the LD50 of morphine in rats. The irritant potential of injectable lorazepam was compared with that of.