Misuse or abuse of oxycodone can lead to very serious complications including overdose. Other serious symptoms that should raise a red flag and prompt a call for emergency help include slow heart rate, convulsions, confusion, cold or clammy skin, severe weakness, severe dizziness, light headedness or fainting. Oxycodone is an opioid pain medication sometimes called a narcotic. Oxycodone is used to treat moderate to severe pain. The extended-release form of oxycodone is for around-the-clock treatment of pain and should not be used on an as-needed basis for pain. (allergy symptoms progress with time, so you may notice your symptoms worsen at some point ) ANSWER It isn't clear if you mean cats allergies to things or your allergy to cats, but both are. Allergic reaction - OxyContin/Oxycodone/Pecocet: Rash - Hives - Panic/ Anxiety - feeling heavy chest & and short breathing Cold sweats - Itchy - Fidgeting -Egeekabeegees Allergic reaction to Oxcy's is quite similar to withdrawal, except for rash/ hives. Oxycodone Allergy Itching doesn’t necessarily mean you’re allergic to oxycodone, but you might be. Any opioid, including oxycodone, can trigger an allergy — but allergies are more common with codeine, morphine and meperidine. True codeine allergy symptoms are much like the symptoms of a pseudoallergy and can include breathlessness, dizziness, and swelling, as well as hives. If you take codeine and this happens, you should speak with your doctor to determine if it is a real allergic reaction or just your reaction to taking a mild opioid.n Allergy Symptoms All opioids, particularly the naturally occurring and semisynthetic compounds, cause allergic reactions. Codeine, morphine, and meperidine are the main opioids that cause most allergic-type reactions. Find information about common, infrequent and rare side effects of Oxycodone Oral. Doctors give unbiased, trusted information on whether Oxycodone can cause or treat Allergic Reaction: Dr. Zimmerman on allergic reaction to oxycodone: The reaction from codeine, Vicodin, Morphine etc are not truly allergic reaction but from these drugs' ability to release histamine from your cells. Thus you will not likely tolerate any drug in. Oxycodone Symptoms and Warning Signs. Painkillers containing oxycodone, such as OxyContin, have severe side effects and dangerous withdrawal symptoms.