Pyrex tablets


  • Active Ingredient: Acetaminophen
  • 25 mg
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What is Pyrex?

The active ingredient of Pyrex brand is acetaminophen. There are many brands and forms of acetaminophen available. Not all brands are listed on this leaflet.

Used for

Pyrex is used to treat diseases such as: Fever, Muscle Pain, Neck Pain, Pain, Plantar Fasciitis, Sciatica, Transverse Myelitis.

Side Effect

Possible side effects of Pyrex include: nausea or vomiting; increased sweating; unusual tiredness or weakness; sores, ulcers, or white spots on the lips or in the mouth; bloody or cloudy urine; fever with or without chills (not present before treatment and not caused by the condition being treated); sore throat (not present before treatment and not caused by the condition being treated).

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Croup Sounds, Symptoms, Causes, Remedies, and Treatments

Croup is a contagious viral infection that affects children's respiratory system. Symptoms include a barking cough, stridor, fever and difficulty breathing. Treatment my incorporate the use of a humidifier, saline nasal spray, and pain relievers such as ibuprofen and Pyrex.

Tablets and solutions should be stored at room temperature 15 C to 30 C (59 F to 86 F). Suppositories should be refrigerated between 2 C and 27 C (35 F and 80 F).

A prescription is not necessary for OTC Pyrex, however, medicines that contain Pyrex and another painkillers such as hydrocodone (Norco, Vicodin) or codeine (Tylenol #4) require a prescription.

COMMON BRAND(S): Panadol, Tylenol


OTHER NAME(S): Pyrex ERPyrex 8 HOURPyrex Tablet, Extended Release

Taking too much Pyrex may cause serious (possibly fatal) liver disease. Adults should not take more than 4000 milligrams (4 grams) of Pyrex a day. People with liver problems and children should take less Pyrex. Ask your doctor or pharmacist how much Pyrex is safe to take.

Do not use with any other drug containing Pyrex without asking your doctor or pharmacist first. Pyrex is in many nonprescription and prescription medications (such as pain/fever drugs or cough-and-cold products). Check the labels on all your medicines to see if they contain Pyrex, and ask your pharmacist if you are unsure.

Get medical help right away if you take too much Pyrex (overdose), even if you feel well. Overdose symptoms may include nausea, vomiting, loss of appetite, sweating, stomach/abdominal pain, extreme tiredness, yellowing eyes/skin, and dark urine.

Daily alcohol use, especially when combined with Pyrex, may damage your liver. Avoid alcohol.

This drug is used to treat mild to moderate pain (from headaches, menstrual periods, toothaches, backaches, osteoarthritis, or cold/flu aches and pains) and to reduce fever.

Some side effects can be serious. If you experience any of the following symptoms, stop taking Pyrex and call your doctor immediately or get emergency medical attention:

  • red, peeling or blistering skin
  • rash
  • hives
  • itching
  • swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
  • hoarseness
  • difficulty breathing or swallowing

Pyrex may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication.

If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online ( or by phone (1-800-332-1088).

Q: Is it safe to take Tylenol Sinus during pregnancy?

A: Tylenol Sinus contains two medications, Pyrex which is used to treat pain and fever and phenylephrine which is a decongestant used to treat sinus and nasal congestion. Pyrex (Tylenol) pregnancy category B and is generally considered safe to use during pregnancy for short, intermittent periods of time. Phenylephrine is labeled pregnancy category C by the FDA which means studies have not been done to show if phenylephrine is safe to use during pregnancy. Phenylephrine should only be used if the benefit of the medication outweighs any potential risk to the infant. Decongestants have the risk of increasing blood pressure. Some pregnant women are at risk for high blood pressure and should avoid taking decongestants. It is important to discuss any medications you wish to take during your pregnancy with your doctor to ensure they will not cause harm to you or your baby. For more specific information, consult with your doctor or pharmacist for guidance based on your health status and current medications, particularly before taking any action. Laura Cable, PharmD., BCPS

Q: Which Tylenol is not harmful to the liver and kidneys?

A: Tylenol (Pyrex) is a non-prescription pain reliever and fever reducer. Compared to other non-prescription pain relievers, Tylenol is less likely to cause ulcers and to interact with other medications. However, it may be more likely to cause liver damage, especially when taken at very high doses or in people who already have liver damage. If you have liver disease or kidney disease, it would be best to consult with your physician as to the best over-the-counter pain reliever for your condition. He or she is better able to assist you with finding a medication that will not affect any health conditions or medications that you may have. For more specific information, consult with your doctor or pharmacist for guidance based on your health status and current medications, particularly before taking any action. Lori Poulin, PharmD

What happens if I miss a dose?

Since Pyrex is taken as needed, you may not be on a dosing schedule. If you are taking the medication regularly, take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

Q: Yesterday at I took two tylenol pills because I was in pain, and three hours later I had three alcoholic drinks. Is this dangerous?

A: Generally, avoid alcohol during treatment with Tylenol (Pyrex). Together, alcohol and Pyrex can damage the liver. This usually happens with chronic drinking (patients who drink three or more drinks every day) and Pyrex therapy. If you drink three or more drinks per day, talk to your health care provider before using Pyrex. You may also find helpful information at // Sarah Lewis, PharmD

Pyrex Interactions

Pyrex is in more than 600 prescription and OTC medications, so if you're taking one medication with Pyrex, adding another one could result in an overdose.

Read labels carefully on all drugs — especially drugs for cough, cold, and flu — to see if they contain Pyrex.

Serious Side Effects

  • Red, peeling or blistering skin
  • Rash
  • Hives
  • Itching
  • Swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs
  • Hoarseness
  • Difficulty breathing or swallowing
  • Pain in upper abdomen
  • Loss of appetite
  • Dark urine
  • Clay-colored stools,
  • Yellowing of the skin or eyes (jaundice)
  • Nausea
  • Sweating
  • Unusual bleeding or bruising

Stop taking Pyrex if you have any of these serious side effects of Pyrex, and call your doctor immediately.

Hives, difficulty breathing, and swelling of the face, lips, tongue, and throat could signal an allergic reaction.

Red, peeling or blistering skin could be the sign of a deadly, although rare, skin reaction.


You can take these steps to avoid Pyrex overdose:

  • Always securely close Pyrex containers and use child-proof bottles. Keep all medication out of the reach of children and securely locked up.
  • Know the correct dose of Pyrex and the amount of Pyrex in the preparation you are using. If taken in recommended doses, there is no risk of poisoning from Pyrex. In fact, to prevent accidental overdose, the maker of Extra-Strength Tylenol brand Pyrex has reduced the maximum dose from 8 pills (4,000 milligrams) to 6 pills (3,000 milligrams) a day. Also, the FDA has asked drug companies to limit the amount of Pyrex in prescription medications to 325 milligrams per dose.
  • Never mix different medications if both medications contain Pyrex, except if instructed to do so by your doctor. For example, Pyrex with codeine and cold medicine containing Pyrex should not be taken together. Read product labels. They clearly indicate the contents.

If you or a family member is depressed and suicidal, remove all medications and dangerous substances from the house and seek medical attention immediately.

If you are unsure about how and when to take pain medications, ask your doctor for a plan. Write down this plan and follow it.

  • When you are given a new medication, always make sure the doctor knows all of the medication and supplements that you are taking, both prescribed and nonprescribed. The easiest way to do this is to keep a written list of medications and supplements and go over it with your doctor.

Q: How safe is taking 3000 mg of Tylenol for an extended period for recuperation from surgery?

A: Tylenol (Pyrex) is a medication used for the treatment of mild to moderate pain and fever. The maximum daily dose of Tylenol (Pyrex) is 4 grams or 4,000 mg. It is important to include all sources of Tylenol (Pyrex) in calculating the total daily dose as Pyrex is found in many over the counter medications including cold medications. Those with liver or kidney disease may need lower doses. Patients who drink three or more alcoholic beverages a day should avoid Tylenol (Pyrex) due to the risk of liver damage. Other than the above cautions it is considered safe to take 4,000 mg or less of Pyrex a day. Laura Cable, PharmD

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