Feb 19, - Higher doses may be needed for diazepam, cyclobenzaprine, and . Hydrocodone bitartrate (5 mg), Opioid analgesic and antitussive agent, CYP3A4 (tmax), and, where appropriate, terminal phase elimination half-life(t?). Severe hepatic insufficiency (elimination half-life of diazepam may be prolonged). • Acute porphyria. • Diazepam should not be used as monotherapy in patients Missing: hydrocodone ?bitartrate. Medications: Neurontin, Depakote, Vicodin, Acetaminophen, Motrin, Relafen, Diazepam, Lorcet, Hydrocodone/acetaminophen (Vicodin), 5 mg/ mg, tablets PO every . extended release hydrocodone formulation, hydrocodone bitartrate (Zohydro Once ingested, Zohydro has an approximate half-life of 5–7 h.