Oxycodone Hydrochloride USP
Oxycodone Hydrochloride USP: ROXICODONE® (oxycodone hydrochloride tablets USP) is an opioid analgesic.
Each tablet for oral administration contains 5 mg, 15 mg or 30 mg of oxycodone
Oxycodone hydrochloride is a white, odorless crystalline powder derived from the opium
alkaloid, thebaine. Oxycodone hydrochloride dissolves in water (1 g in 6 to 7 mL) and is
considered slightly soluble in alcohol (octanol water partition coefficient is 0.7).
Chemically, oxycodone hydrochloride is 4, 5α-epoxy-14-hydroxy-3-methoxy-17
methylmorphinan-6-one hydrochloride. The 5 mg Roxicodone tablet contains inactive ingredients: microcrystalline cellulose and
stearic acid. The 15 and 30 mg tablets contain the following inactive ingredients:
microcrystalline cellulose; sodium starch glycolate; corn starch; lactose; stearic acid; D&C
Yellow No. 10 (15 mg tablet); and FD & C Blue (15 mg and 30 mg tablets).
The 5 mg, 15 mg and 30 mg tablets contain the equivalent of 4.6 mg, 13.5 mg and 27.0 mg,
respectively, of oxycodone free base.
The analgesic ingredient, oxycodone, is a semi-synthetic narcotic with multiple actions
qualitatively similar to those of morphine; the most prominent of these involves the central
nervous system and organs composed of smooth muscle.
Oxycodone, as the hydrochloride salt, is a pure agonist opioid whose principal therapeutic
action is analgesia and has been in clinical use since 1917. Like all pure opioid agonists, there is no ceiling effect to analgesia, such as is seen with partial agonists or non-opioid analgesics.
Based upon a single-dose, relative-potency study conducted in humans with cancer pain, 10 to
15 mg of oxycodone given intramuscularly produced an analgesic effect similar to 10 mg of
morphine given intramuscularly. Both drugs have a 3 to 4 hour duration of action. Oxycodone
retains approximately one half of its analgesic activity when administered orally.
Effects on Central Nervous System: The precise mechanism of the analgesic action is
unknown. However, specific CNS opioid receptors for endogenous compounds with opioidlike activity have been identified throughout the brain and spinal cord and play a role in the
analgesic effects of this drug. A significant feature of opioid-induced analgesia is that it
occurs without loss of consciousness. The relief of pain by morphine-like opioids is relatively
selective, in that other sensory modalities, (e.g., touch, vibrations, vision, hearing, etc.) are not
Oxycodone produces respiratory depression by direct action on brain stem respiratory centers.
The respiratory depression involves both a reduction in the responsiveness of the brain stem
respiratory centers to increases in carbon dioxide tension and to electrical stimulation.
Oxycodone depresses the cough reflex by direct effect on the cough center in the medulla.
Antitussive effects may occur with doses lower than those usually required for analgesia.
Oxycodone causes miosis, even in total darkness. Pinpoint pupils are a sign of opioid
overdose but are not pathognomonic (e.g, pontine lesions of hemorrhagic or ischemic origins
may produce similar findings). Marked mydriasis rather than miosis may be seen due to
hypoxia in overdose situations.
Effects on Gastrointestinal Tract And Other Smooth Muscle: Oxycodone, like other opioid
analgesics, produces some degree of nausea and vomiting which is caused by direct
stimulation of the chemoreceptor trigger zone (CTZ) located in the medulla. The frequency
and severity of emesis gradually diminishes with time.
Oxycodone may cause a decrease in the secretion of hydrochloric acid in the stomach that
reduces motility while increasing the tone of the antrum, stomach, and duodenum. Digestion
of food in the small intestine is delayed and propulsive contractions are decreased. Propulsive
peristaltic waves in the colon are decreased, while tone may be increased to the point of
spasm resulting in constipation. Other opioid-induced effects may include a reduction in
biliary and pancreatic secretions, spasm of sphincter of Oddi, and transient elevations in
Effects on Cardiovascular System: Oxycodone, in therapeutic doses, produces peripheral
vasodilatation (arteriolar and venous), decreased peripheral resistance, and inhibits
baroreceptor reflexes. Manifestations of histamine release and/or peripheral vasodilatation
may include pruritus, flushing, red eyes, sweating, and/or orthostatic hypotension.
Caution should be used in hypovolemic patients, such as those suffering acute myocardial
infarction, because oxycodone may cause or further aggravate their hypotension. Caution
should also be used in patients with cor pulmonale who have received therapeutic doses of