IM: IV: SC: Neonates mg/kg q 4–8 hr, maximum dose: mg/kg. at the time of the peak if previous dose is ineffective and side effects are minimal. High Alert: Do not confuse morphine with hydromorphone–errors have resulted in death. leucovorin calcium; lidocaine; linezolid; lorazepam; magnesium sulfate. ROUTE. ONSET. PEAK. DURATION. Inhaln. 1 min unknown. 1 – 3 hr. Subcut Low-dose epidural, topical, inhaled or ophthalmic epinephrine are unlikely to . nate, hydromorphone, ibuprofen, idarubicin, ifosfamide, imipenem/cilastatin, ir- caclium, lidocaine, linezolid, lorazepam, magnesium sulfate, mannitol, mechlor-. Hydromorphone, also known as dihydromorphinone, and sold under the brand name Dilaudid, The hydrochloride salt is soluble in three parts of water, whereas a gram of morphine hydrochloride 1 Side effects These can start within hours of taking the last dose of hydromorphone and can last up to several weeks.