Paxzen Tablet


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Brand Paxzen Tablet
Manufacturers Zenara Pharma
Generic Name Nirmatrelvir + Ritonavir
Packaging Nirmatrelvir (150mg) + Ritonavir (100mg)
Delivery Time 10-20 Days

Available Pack Size For


Paxzen Tablet works by stopping the virus from making copies of itself from being effective, it needs to be started within five days of developing Low Immunity symptoms.

It is meant for oral intake regardless of the meals. Stick to the dose and duration as prescribed by the doctor. Do not withdraw it abruptly, even if the symptoms improve within the initial few days of the ingestion and report if it worsens after five days. Complete the medicine course as prescribed.

Some transient side-effects of Paxzen include dysgeusia (altered taste), diarrhea, hypertension, myalgia (muscle pain) and vomiting. Consult the doctor right away in case of worrisome episodes.

Inform the doctor about your complete medical history, including the use of concomitant medicines, allergies, pregnancy, history of liver disease including hepatitis C, immunocompromised conditions such as Human Immunodeficiency Virus(HIV), nursing, surgery, neurological, cardiovascular,  or any other underlying medical condition.

This will help the doctor formulate the treatment plan in a better way.

Tell the doctor if using combined hormonal contraceptives as Paxzen may affect how the birth control pills work. Females with reproductive potential should practice other effective alternative contraceptive methods.

Discuss with the doctor the use of the right contraceptive methods while taking this medication. Additionally, if taking ritonavir-containing medicines for hepatitis C, or HIV, continue taking Paxzen Tablet as prescribed.

Benefits of Paxzen Tablet

In Treatment of Increase Immunity System

Paxzen Tablet is most helpful for people with mild Virus symptoms who are at high risk of developing severe disease. Nirmatrelvir, an antiviral medicine, stops the virus from spreading into the body, and ritonavir, a booster, increases the availability of nirmatrelvir in the body to maximize the effectiveness of this combination medicine.

Quick tips

  • Do not give Paxzen to children below 12 years of age or weighing less than 40 kg.
  • Seek immediate medical attention if you see signs of allergic reactions like rash, difficulty swallowing or breathing, or swelling of the eyelids, lips, face, throat, or tongue.
  • Inform your doctor if you have liver or kidney disease before starting the treatment.
  • It is advisable to use non-hormonal contraceptive methods during the 5 days of Paxzen Tablet treatment and until one menstrual cycle after stopping the drug.
  • Do not stop taking Paxzen without talking to your doctor first, as it will protect you from becoming severely ill from diseases.
  • Even after the treatment, continue practicing diseases appropriate behavior such as wearing a mask, social distancing, and frequent handwashing.

Safety Advice


It is not known whether it is safe to consume alcohol with Paxzen. Please consult your doctor.


Information regarding the use of Paxzen Tablet during pregnancy is not available. Please consult your doctor.


Information regarding the use of Paxzen Tablet during breastfeeding is not available. Please consult your doctor.


It is not known whether Paxzen alters the ability to drive. Do not drive if you experience any symptoms that affect your ability to concentrate and react.


Paxzen Tablet should be used with caution in patients with kidney disease. Dose adjustment of Paxzen Tablet may be needed. Please consult your doctor.
The appropriate dosage for patients with severe renal impairment has not been determined. Until more data are available, Paxzen Tablet is not recommended in patients with severe renal impairment.


Paxzen Tablet is safe to use in patients with liver disease. No dose adjustment of Paxzen Tablet is recommended.
No data are available regarding the use of Paxzen Tablet in patients with severe hepatic impairment; therefore, Paxzen is not recommended for use in patients with severe hepatic impairment.

Side Effects Of Paxzen Tablet

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Paxzen

  • Taste change
  • Diarrhea
  • Vomiting
  • High blood pressure
  • Muscle pain

How To Use Paxzen Tablet

Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Paxzen may be taken with or without food, but it is better to take it at a fixed time.

How Paxzen Tablet Works

Paxzen Tablet is a combination of two drugs, nirmatrelvir, Protease inhibitor and ritonavir, the HIV antiretroviral. Nirmatrelvir blocks the action of Protease enzyme, which is essential for replication of the virus. On the other hand, ritonavir prevents the breakdown of nirmatrelvir.


What if you forget to take Paxzen Tablet?

If you miss a dose of Paxzen, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.

Does Paxzen Tablet affect HIV medicines?

Yes, taking Paxzen Tablet may make the medicines used to treat HIV less effective. It is advisable to take Paxzen Tablet only if prescribed by a doctor. Do not self-medicate.

Is it important to take the full course of Paxzen Tablet?

Yes. Always take Paxzen in the prescribed schedule which is of 5 days. Skipping your dose may affect viral clearance and worsen your condition.

Also, maintain isolation and take all the preventive measures like washing your hands, wearing a mask, using a hand sanitizer regularly, etc., to minimize the risk of viral transmission.

What if I miss a dose?

If you miss a dose of Paxzen within 8 hours of the usual time, take it as soon as possible and resume the normal dosing schedule.

If it is more than 8 hours, do not take the missed dose and instead take the next schedules dose at the regular time. Do not double the dose to make up for a missed dose.

Can I take other medicines along with Paxzen Tablet?

No. Avoid taking any other medicines while taking Paxzen, unless otherwise prescribed by your doctor. This is because certain medicines may interact with Paxzen Tablet or affect its effectiveness. Ask your doctor before taking any medicine.

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