M523 Pill is a narcotic analgesic combination of Acetaminophen and Oxycodone Hydrochloride, Used in the treatment and management of mild to chronic pain.
| Pill Name | M523 Pill |
| Color | White |
| Shape | Capsule Shape |
| Pregnancy Category | Pregnancy Category C |
Key Facts of M523 Pill

M523 Pill starts it’s action within half hour of administration and action last for 3-6 hours.
Being narcotic analgesic in the nature, it may cause addiction in many people if not used accordingly to the instructions of prescribing doctor.
Ask your doctor about withdrawal plan if it is prescribed for more than 10 days.
Constipation, Dizziness, Tiredness are the most common side effects of M523 Pill.
Other similar pills – T 192 pill, K9 Pill, K57 Pill
| Active Ingredient | Acetaminophen + Oxycodone |
| Supplier | Mallinckrodt Pharmaceuticals |
| Route of Administration | Oral |
| Availability | Prescription Only |
Who can and can not take m523 pill?
Mostly it is safe to consume M523 pill by most of the adults and children over the age of one year.
However, it may be not suitable for people having certain conditions:
Do not consume m523 if you ever had an allergic reaction to any ingredient of M523 pill in the past.
People with alcohol or any other addiction should also avoid this pill.
People with mental or CNS conditions like Seizures, Epilepsy should not be consuming m523 pill.
Kidney or liver patient should also consult a doctor before consuming m523 pill.
Pill is also contraindicated in people with Asthma and any other lung problems.
Common dosage of m523 pill
The usual dose of m523 pill is a single pill twice a day, Mostly your dose will be decided by the doctor and it should vary from person to person according to your condition.
Usually, in the beginning low dose is prescribed which is increased gradually until your pain is well controlled.
To stop taking m523 pill your doctor will gradually reduce your dose, especially if you’ve been taking this for a significantly long time.
What if i forget a dose of m523 pill?
If you forget to take a dose of m523 pill then you should take it as soon as you remember it. However, if it is almost a time for next dose then you should skip the missed dose and should continue with next dose.
If you forget doses more often then you should set an alarm or take it on the same time every day to keep you reminded.
What happen if i overdose m523 pill?
It’s important not to take more than your prescribed dose, as you might get serious side effects due to an overdose.
Common symptoms of m523 pill
- Pin-point pupils,
- Respiratory depression,
- Hypotension,
- Circulatory failure,
- Deepening coma,
- Bradycardia and death
You should immediately seek emergency help or call 911 if you feel any severe side effects listed above.
Cardiac arrest or arrhythmias may require cardiac massage or defibrillation. Naloxone may be used as an antidote.
Side effects of m523 pill
Like all other medications, M523 Pill also causes some side effects. Although they are very rare and may happen in very small percentage of the people.
Usually, they go away on their own without any special treatment, but in some cases they can bother you.
Common side effects of m523 pill
- Constipation,
- Severe Headache,
- Confusion,
- Nausea & Vomiting,
- Dizziness,
- Drowsiness,
- Allergic Rash.
Speak to your doctor or pharmacist if your side effects don’t go away within a day. Also discontinue the pill if you note any severe side effects.
Use of m523 pill in pregnancy and breastfeeding
Usually, M523 pill is not recommended in the pregnancy or breastfeeding. It is a pregnancy category C drug and that’s why it should be avoided in pregnancy unless it is recommended by the doctor.
Although, If other pain killers failed, then it should be used with a doctor’s concern.
Before starting this pill, Inform your doctor about if you are planning or trying to get pregnant.
Drug Interactions of m523 pill
Drug interaction can severely alter the pharmacological action of m523 pill and hence you should inform your doctor about your current ongoing medication including your nutritional and herbal supplements.
Following is the list of drugs, Which should be avoided while taking m253 pill.
- Zolpidem,
- Fentanyl,
- Cyclobenzaprine,
- Pregabaline,
- Morphine,
- Alprazolam,
- Diphenhydramine.

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