Toradol (ketorolac): Was given an im injection in the buttocks for migraines and it was completely ineffective. The pain that the injection caused was infuriating considering there was absolutely no relief of the headache..
Examples of full agonists are oxycodone, methadone, codeine, heroin and morphine. PARTIAL AGONISTS. Partial agonists are drugs that bind primarily to mu opioid receptors and cause them to produce endorphins but to a much lesser extent than full agonists. BuprenorphineÂ®, SuboxoneÂ® and SubutexÂ® are partial agonists.
How Codeine Works in the Body. Background Information| Chemical Structure| How Codeine Works in the Body| Recreational Use| How Codeine Affects History. Codeine is a weak opiate agonist that provides relief from pain by blocking the pain signals that are being sent from the brain to affected areas of the body.