Synthivan Tablet (Atazanavir + Ritonavir)

Atazanavir and Ritonavir are antiviral medications used in combination to treat Human Immunodeficiency Virus (HIV) infections. The combination is commonly available as a fixed-dose tablet called Synthivan. 

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Synthivan Tablet (Atazanavir (300mg) + Ritonavir (100mg))

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30 Tablet/s $108.20
60 Tablet/s $216.40
90 Tablet/s $325.00

Atazanavir + Ritonavir Tablet (Synthivan) Introduction

Atazanavir and Ritonavir are antiviral medications used in combination to treat Human Immunodeficiency Virus (HIV) infections. The combination is commonly available as a fixed-dose tablet called Synthivan. Atazanavir belongs to the class of drugs known as protease inhibitors, while Ritonavir is a pharmacokinetic enhancer used to boost the levels of Atazanavir in the blood, allowing for a more effective antiviral response. Atazanavir + Ritonavir is classified as a Life-Saving Drug due to its vital role in managing HIV infections.  

Effective Antiviral Treatment: Atazanavir + Ritonavir has been proven to be an effective antiviral treatment for HIV infections. With its ability to suppress the virus, reduce drug resistance, and enhance overall treatment tolerance, it plays a crucial role in managing the condition and improving patients' quality of life.

Dosage Information

The dosage of Atazanavir + Ritonavir (Synthivan) may vary depending on individual factors, including the patient's age, weight, and their response to treatment. It is essential to follow the prescribing doctor's instructions and adhere to the recommended dosage. Typically, the standard adult dosage of Atazanavir + Ritonavir is one tablet taken once daily, with or without food. It is crucial to take the medication at the same time every day to maintain a consistent level of the drug in the bloodstream. Swallow the tablet whole with water and avoid crushing or splitting it. For pediatric patients, the dosage is determined based on their body weight and medical condition. It is imperative to consult a healthcare professional to determine the appropriate dosage for children.

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Some of the important Safety Advice to be taken while using Synthivan Tablet (Atazanavir + Ritonavir)

  • Allergic Reactions: Before starting Atazanavir + Ritonavir treatment, patients should inform their healthcare provider of any known allergies to these medications or other components of the drug. Allergic reactions can range from mild skin rashes to severe anaphylaxis, a life-threatening condition.
  • Medical History: Patients should disclose their complete medical history, including any liver or kidney disorders, bleeding disorders, diabetes, or cardiovascular issues. This information helps the healthcare provider tailor the treatment plan accordingly and avoid potential complications.
  • Pregnancy and Breastfeeding: Pregnant or breastfeeding individuals should consult their healthcare provider before using Atazanavir + Ritonavir. The benefits and risks of the medication must be carefully evaluated in such cases to ensure the well-being of both the mother and the child.
  • Liver Function: Regular monitoring of liver function is essential during Atazanavir + Ritonavir therapy, as these medications can affect liver enzymes. Patients with pre-existing liver conditions should be closely monitored to prevent further liver damage.
  • Kidney Function: Kidney function should be assessed before starting treatment, as Atazanavir is primarily excreted through the kidneys. Dose adjustments may be necessary in patients with impaired kidney function to prevent drug accumulation.
  • Cardiac Health: Atazanavir has been associated with potential risks of QT interval prolongation, which may lead to abnormal heart rhythms. Patients with a history of heart rhythm disturbances should be monitored closely during treatment.
  • Diabetes and Hyperglycemia: Atazanavir + Ritonavir can cause or exacerbate hyperglycemia (high blood sugar levels). Diabetic patients may need adjustments in their diabetes management plan while on this medication.
  • Interactions with Food: Atazanavir absorption can be affected by certain foods. Patients should follow their healthcare provider's instructions regarding food intake and the timing of medication administration.

Some of the specific indications for Atazanavir + Ritonavir Tablet (Synthivan) include 

  • HIV Treatment: Atazanavir + Ritonavir is primarily used to manage HIV infections in adults and pediatric patients weighing at least 15 kg. It is a part of the antiretroviral therapy (ART) regimen, which helps suppress the replication of the virus and slows down the progression of HIV to Acquired Immunodeficiency Syndrome (AIDS).
  • Antiviral Treatment: The combination of Atazanavir and Ritonavir is a potent antiviral treatment that inhibits the action of the HIV protease enzyme. This prevents the virus from maturing and infecting new cells, ultimately reducing the viral load in the body and improving the patient's immune system.
  • Boosting Atazanavir: Ritonavir acts as a pharmacokinetic enhancer, which means it increases the concentration and half-life of Atazanavir in the blood. This "boosting" effect enhances Atazanavir's efficacy, allowing for once-daily dosing and improving overall treatment adherence.
  • Reducing Drug Resistance: The combination of Atazanavir and Ritonavir is beneficial in reducing the risk of developing drug resistance in HIV patients. By maintaining a consistent level of the drug in the bloodstream, the likelihood of the virus developing resistance to Atazanavir is minimized.
  • Improved Treatment Tolerance: Atazanavir + Ritonavir has been found to have a favorable side effect profile, leading to improved treatment tolerance in many patients. This aspect is crucial in promoting adherence to the treatment regimen, ensuring better treatment outcomes.
  • Treatment in Special Populations: Atazanavir + Ritonavir has been used effectively in pregnant individuals living with HIV to prevent mother-to-child transmission. Additionally, it has shown positive results in patients co-infected with Hepatitis B or C.

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Important Adverse effects of using Synthivan Tablet (Atazanavir + Ritonavir) must be noticed 


While Atazanavir + Ritonavir is a life-saving drug for HIV treatment, like all medications, it can cause side effects. It is essential to be aware of these potential adverse reactions and promptly inform a healthcare provider if any of the following occur:

  • Gastrointestinal Issues: Nausea, vomiting, diarrhea, and stomach pain are common side effects. Taking the medication with food may help alleviate these symptoms.
  • Jaundice: Atazanavir + Ritonavir can occasionally cause yellowing of the skin and eyes due to increased bilirubin levels. This may be a sign of liver dysfunction and requires immediate medical attention.
  • Rash: Some individuals may develop skin rashes or allergic reactions while on the medication. If a rash occurs, medical advice should be sought.
  • Hyperbilirubinemia: Atazanavir is known to cause elevated bilirubin levels in the blood, leading to discoloration of the eyes and skin.
  • Changes in Fat Distribution: Long-term use of Atazanavir + Ritonavir can lead to changes in fat distribution, resulting in increased fat in certain areas of the body and reduced fat in others.
  • Pancreatitis: In rare cases, the medication may cause inflammation of the pancreas (pancreatitis), leading to severe abdominal pain.
  • Hyperglycemia: Atazanavir + Ritonavir can cause high blood sugar levels, particularly in patients with pre-existing diabetes.
  • QT Prolongation: In some cases, Atazanavir has been associated with prolonged QT intervals, potentially leading to abnormal heart rhythms.
  • Immune Reconstitution Inflammatory Syndrome (IRIS): During the initial stages of HIV treatment, some patients may experience worsening symptoms due to the body's improved immune response. This is known as IRIS and typically resolves with time.

FAQs about Atazanavir + Ritonavir Tablet (Synthivan)

Q: Can I take Atazanavir + Ritonavir with other medications for HIV treatment?

A: It is crucial to inform your healthcare provider about all medications you are taking, including prescription, over-the-counter, and herbal drugs. Some medications may interact with Atazanavir + Ritonavir, affecting their effectiveness or increasing the risk of side effects. Your doctor will assess potential drug interactions and tailor the treatment plan accordingly.

Q: Are there any specific dietary restrictions while on Atazanavir + Ritonavir therapy?

A: Yes, Atazanavir absorption can be influenced by certain foods. It is recommended to take the medication with food or within 30 minutes after a meal. Avoid taking it with antacids, dairy products, and high-fat meals, as they may decrease drug absorption. Following your healthcare provider's dietary recommendations ensures optimal drug levels in the bloodstream.

Q: Can pregnant individuals with HIV take Atazanavir + Ritonavir?

A: Pregnant individuals should consult their healthcare provider before starting any medication. Atazanavir + Ritonavir may be prescribed for pregnant individuals with HIV to prevent mother-to-child transmission. However, the benefits and risks of the medication during pregnancy must be carefully evaluated, and alternative treatments may be considered based on individual circumstances.

Q: Can Atazanavir + Ritonavir be used in pediatric patients?

A: Yes, Atazanavir + Ritonavir is approved for use in pediatric patients weighing at least 15 kg. The dosage is determined based on the child's weight and medical condition. Pediatric patients should be closely monitored by healthcare professionals to ensure the medication's safety and efficacy.

Q: Is Atazanavir + Ritonavir the only treatment required for HIV management?

A: Atazanavir + Ritonavir is a crucial component of antiretroviral therapy (ART) for HIV management. However, HIV treatment typically involves a combination of several antiretroviral drugs to effectively suppress the virus, reduce drug resistance, and enhance treatment outcomes. Your healthcare provider will create a comprehensive treatment plan based on your individual needs and medical history.

Some significant drug interactions with Synthivan Tablet (Atazanavir + Ritonavir) include:

  • Antacids: Antacids containing aluminum or magnesium should be taken at least 2 hours before or after Atazanavir + Ritonavir. Taking them together can reduce the absorption of the antiviral drugs.
  • H2 Receptor Antagonists and Proton Pump Inhibitors (PPIs): These drugs, commonly used for acid reflux and ulcers, can reduce Atazanavir levels in the blood, compromising their effectiveness.
  • St. John's Wort: This herbal supplement can significantly decrease Atazanavir levels, potentially leading to treatment failure and drug resistance.
  • Certain Antibiotics: Rifampin, a common antibiotic, can reduce Atazanavir levels in the blood. Alternative antibiotics may be needed if co-administration is required.
  • Other Antiretrovirals: Certain antiretroviral drugs may interact with Atazanavir + Ritonavir, affecting drug levels and potentially increasing the risk of side effects.
  • Methadone: Co-administration of Atazanavir + Ritonavir with methadone, used for opioid addiction treatment, may require adjustments in methadone dosing to prevent withdrawal symptoms or methadone toxicity.
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Manufacturer : Cipla Pharma, India
Equivalent Brand : Atazanavir + Ritonavir
Generic Search : Atazanavir + Ritonavir