Buy Norvir Online

(Ritonavir)

The active ingredient in Norvir is ritonavir, a protease inhibitor and antiretroviral drug.

Ritonavir works by blocking an enzyme called HIV protease. This enzyme is needed for the human immunodeficiency virus (HIV) to multiply. By inhibiting this enzyme, ritonavir helps stop the virus from making new copies of itself. As a result, the amount of HIV in the blood decreases, which helps protect the immune system. Ritonavir also affects the pharmacokinetic breakdown of certain other HIV medicines, increasing their levels in the body.

Follow all directions given to you by your doctor and read all documents provided, including the full Prescribing Information, FDA-Approved Product Labeling, Instructions for Use, and Medication Guide before using Norvir. However, the following is a synopsis of the general guidelines for the use of Norvir:

• Take Norvir exactly as prescribed by your healthcare provider.
• Norvir is available as tablets and as an oral solution.
• It is usually taken with food to help reduce stomach upset.
• Swallow tablets whole.
• Shake the oral solution well before measuring a dose.
• Norvir is often used in combination with other antiretroviral agents such as atazanavir, darunavir, fosamprenavir, or saquinavir.
• Do not change your dose or stop treatment without medical advice.

If you miss a dose, take it as soon as you remember unless it is close to your next dose. Do not double the next dose.

Some mild or common side effects of ritonavir seen in clinical trials include:

• Nausea.
• Vomiting.
• Diarrhea.
• Abdominal pain.
• Loss of appetite.
• Changes in cholesterol or triglycerides.
• Taste changes.
• Tingling in the hands or feet.
• Weakness.
• Rash.
• Stomach pain.
• Dizziness.

Some individuals may experience serious side effects while using Norvir. These side effects may require immediate medical attention. If you experience any of the following, contact your healthcare provider or seek emergency medical help:

• Pancreatitis, which may cause severe stomach pain, nausea, and vomiting.
• Liver problems, which may include yellowing of the skin or eyes, dark urine, or abdominal pain.
• Severe allergic reactions, including rash, hives, swelling, or trouble breathing.
• High blood sugar, which may cause increased thirst, frequent urination, or fatigue.
• Irregular heartbeat or lightheadedness.
• Increased bleeding in people with hemophilia.
• Changes in body fat distribution.

These are not all of the possible side effects of Norvir. You should always seek medical advice from your healthcare provider for any questions or concerns about your medical condition or treatment. Read all patient information, medication guides, or drug information sheets that come with this medication. You can also report adverse effects to the Food and Drug Administration at www.fda.gov/medwatch or 1-800-FDA-1088.

Before starting Norvir, it is crucial to discuss any existing health conditions with your healthcare provider. You should be sure that your healthcare provider is aware of all your medical conditions, including:

• Liver disease or hepatitis.
• High cholesterol or high triglycerides.
• Diabetes or high blood sugar.
• Heart rhythm problems or irregular heartbeat.
• Hemophilia.
• If you are pregnant, planning pregnancy, or breastfeeding.
• Erectile dysfunction.

Boxed Warning

Norvir has a boxed warning regarding significant drug interactions that may lead to serious or life-threatening reactions when used with certain medicines.

Norvir is contraindicated in patients with known hypersensitivity to ritonavir. It is also contraindicated with certain medications due to serious drug interactions, including:

• Simvastatin or lovastatin, due to the risk of severe muscle toxicity.
• Pimozide, amiodarone, quinidine, or propafenone, due to the risk of serious heart rhythm problems.
• Ergot derivatives such as dihydroergotamine, ergotamine, or methylergonovine, due to the risk of ergot toxicity.
• Cisapride, alfuzosin, lurasidone, ranolazine, lomitapide, and certain others due to life-threatening reactions.
• St. John’s wort, which can reduce ritonavir levels and decrease effectiveness.

Norvir begins working soon after starting treatment, but it may take several weeks to see a significant drop in viral load. Regular blood tests will measure HIV levels and the immune system response.

When Norvir is taken with other prescription drugs, over-the-counter medications, vitamins, and supplements, it may change how they work or increase the frequency or severity of side effects. Make sure that you tell your healthcare professional about anything that you are taking to avoid any negative drug interactions, including:

• Simvastatin, lovastatin, atorvastatin, or rosuvastatin, due to increased risk of muscle toxicity.
• Sildenafil, vardenafil, or avanafil, which are used for erectile dysfunction or pulmonary arterial hypertension (PAH), due to increased risk of low blood pressure and side effects.
• Warfarin, because ritonavir may change its blood levels.
• Rifampin or rifabutin, which may alter ritonavir levels.
• Carbamazepine or phenytoin, which may reduce ritonavir's effectiveness.
• Tacrolimus or sirolimus, which may increase the risk of toxicity.
• Digoxin, which may require monitoring.
• Methadone, which may require dose adjustment.
• Hormonal contraceptives, which may be less effective.
• Herbal products such as St. John’s wort, which reduce ritonavir levels.
• Certain opioid pain medications, such as fentanyl or meperidine.
• Theophylline.
• Dexamethasone.
• Apalutamide.
• Colchicine.
• Bupropion.
• Bosentan.
• Triazolam.
• Midazolam.
• Voriconazole.
• Clarithromycin.
• Trazodone.
• Salmeterol.
• Rivaroxaban.
• Fluticasone.
• Buspirone.

Norvir is available as tablets and as an oral solution.

Dosing depends on whether ritonavir is used as a booster with another protease inhibitor or as part of a specific regimen. Typical adult booster doses are lower and taken once or twice daily with food. Pediatric dosing is based on body weight or body surface area. Your healthcare provider will determine the correct dose.

Norvir tablets should be stored at room temperature, away from moisture and heat, and out of the reach of children. The oral solution has specific storage instructions in the prescribing information and should also be kept out of the reach of children.

Norvir is manufactured by AbbVie.

Yes, ritonavir is available as a generic medication.

Do not stop taking Norvir without speaking to your healthcare provider. Stopping treatment suddenly can increase viral load and lead to resistance. Your provider will guide any changes to therapy.

Talk to your doctor if you are pregnant or planning a pregnancy. Norvir has been used in pregnancy as part of antiretroviral therapy, but risks and benefits should be discussed with your healthcare provider.

HIV can be passed to a baby through breast milk, so breastfeeding is not recommended. Your healthcare provider will advise you on feeding options.