What is Jakavi?
Jakavi (ruxolitinib) is an FDA-approved medication used to treat specific blood disorders.
It is indicated for adults with myelofibrosis, where the bone marrow becomes scarred and impairs blood cell production.
Jakavi helps manage symptoms such as an enlarged spleen and is used for various forms of myelofibrosis, including primary myelofibrosis, and cases that develop after treatment for polycythemia vera or essential thrombocythemia.
Additionally, Jakavi is prescribed for adults with polycythemia vera who do not respond to or cannot tolerate hydroxyurea, a common treatment for this condition.
Jakavi should be taken exactly as your doctor prescribes, with or without food, to ensure optimal effectiveness and manage any potential side effects.
How Does Jakavi Work?
Jakavi works by targeting specific proteins in the body involved in regulating blood cell production and immune responses.
It blocks Janus Associated Kinases (JAKs), such as JAK1 and JAK2, which transmit signals from growth factors and cytokines affecting blood cell production and immune system function.
In conditions like myelofibrosis and polycythemia vera, these signals can be imbalanced, leading to issues like excessive blood cells.
By inhibiting JAKs, Jakavi corrects this imbalance, reducing symptoms and controlling abnormal cell growth.
It also helps with conditions like graft-versus-host disease by reducing inflammation and immune cell activity.
Dosage Information and Usage
Dosage Form and Strengths of Jakavi
Each strength contains varying amounts of lactose monohydrate:
- 5 mg tablet: 71.45 mg
- 10 mg tablet: 142.90 mg
- 15 mg tablet: 214.35 mg
- 20 mg tablet: 285.80 mg
Usage
Jakavi is taken orally, with or without food.
The initial dose depends on the condition and the patient’s blood cell counts.
For myelofibrosis, the usual starting dose is 15 mg twice daily for patients with a platelet count between 100,000 and 200,000/mm³, and 20 mg twice daily for those with a higher count.
For polycythemia vera, the starting dose is typically 10 mg twice daily. If blood counts drop too low, treatment may be adjusted by pausing or reducing the dose.
Dose adjustments are required for severe renal or hepatic impairment. Avoid taking Jakavi with strong CYP3A4 inhibitors or high fluconazole doses without a dose reduction.
Regular blood cell count monitoring is necessary for safety and effectiveness.
Side Effects
Common Side Effects
- Urinary tract infections (UTIs)
- Low levels of red blood cells (anemia)
- Bruising, bleeding gums, or nosebleeds
- Weight gain
- High cholesterol and fats
- Headaches
- Dizziness
- High pancreatic enzyme levels
- Constipation
Serious but Rare Side Effects
- Signs of infection (fever, chills, muscle aches)
- Severe bleeding (blood in urine, stool, or vomiting)
- High blood pressure
- Risk of non-melanoma skin cancer
Warnings and Precautions
- Decrease in Blood Cell Count: Jakavi can reduce levels of various blood cells. This includes platelets (leading to bleeding issues), red blood cells (causing anemia), and white blood cells (leading to infections). Regular blood tests are necessary to track these levels, and doses may need adjustment based on test results.
- Infections: Jakavi increases the risk of severe infections caused by bacteria, fungi, or viruses. Patients should be closely monitored for any signs of infection, such as fever or unusual symptoms. Treatment for infections should begin promptly. Jakavi should not be started if a patient has an active serious infection.
- Tuberculosis: Jakavi may reactivate latent tuberculosis (TB). Before starting treatment, patients should be screened for both active and latent TB to prevent complications.
- Hepatitis B: Jakavi can cause an increase in hepatitis B virus levels in the blood. For patients with chronic hepatitis B, regular monitoring and management according to clinical guidelines are necessary to prevent liver-related complications.
- Herpes Zoster: Jakavi may increase the risk of developing shingles (herpes zoster), a viral infection causing painful skin rashes. Patients should be aware of the symptoms and seek medical advice if they notice any signs of the infection.
- Progressive Multifocal Leukoencephalopathy (PML): This rare but serious brain infection can occur with Jakavi. Symptoms may include changes in mental status or motor functions. If PML is suspected, Jakavi should be discontinued until it is confirmed that PML is not present.
- Non-Melanoma Skin Cancer: Jakavi has been associated with an increased risk of non-melanoma skin cancers, such as basal cell carcinoma and squamous cell carcinoma. Patients, particularly those with a history of skin conditions or extended treatment with other drugs like hydroxyurea, should have regular skin examinations.
- Lipid Abnormalities: Jakavi can raise cholesterol and triglyceride levels in the blood, which may increase the risk of heart problems. Regular lipid monitoring is recommended, and treatment may be needed to manage elevated levels.
- Renal Impairment: For patients with severe kidney impairment, the starting dose of Jakavi should be reduced. Those with end-stage renal disease on dialysis may need special dosing adjustments and close monitoring to ensure safety and effectiveness.
- Hepatic Impairment: In patients with liver issues, Jakavi doses should be initially reduced by about half and then adjusted based on ongoing monitoring. Regular blood tests are required to check liver function and adjust the dose as needed.
- Pediatrics: The use of Jakavi in children has not been studied, so its safety and effectiveness in pediatric patients are unknown
- Geriatrics: Elderly patients do not require specific dose adjustments for Jakavi, but they should still be monitored for potential side effects and dose adjustments based on their overall health and response to the drug.
Overdosage of Jakavi
If someone overdoses on Jakavi, there isn’t a specific antidote available.
While single doses up to 200 mg have been tolerated without immediate severe effects, exceeding the recommended dose repeatedly can result in serious blood-related issues like low white blood cells, anemia, and low platelet counts.
If an overdose occurs, managing these complications requires supportive care.
It’s important to note that Hemodialysis, a treatment that filters waste from the blood, won’t eliminate Jakavi from the body.
Drug Interactions With Other Medications
- Strong CYP3A4 Inhibitors: Medications like ketoconazole and ritonavir strongly block the CYP3A4 enzyme, which helps break down Jakavi. This can lead to higher levels of Jakavi in the body, increasing the risk of side effects. To manage this, Jakavi doses should be cut in half, and patients should be closely monitored for any adverse effects.
- Mild or Moderate CYP3A4 Inhibitors: Drugs such as erythromycin moderately affect the CYP3A4 enzyme and can slightly raise Jakavi levels. Although a dose adjustment is not usually needed, patients should be observed for any new or worsening side effects when these drugs are started.
- Dual Moderate CYP2C9 and CYP3A4 Inhibitors: Medications such as fluconazole block CYP2C9 and CYP3A4 enzymes, causing Jakavi levels to rise significantly. It is advised to cut Jakavi dosage by 50% and avoid fluconazole doses above 200 mg per day to prevent excessive Jakavi levels.
- CYP3A4 Inducers: Medications such as rifampin increase CYP3A4 enzyme activity, reducing Jakavi levels and its effectiveness. Monitoring is important, and the Jakavi dose might require adjustment based on the patient’s response to the inducer.
- P-glycoprotein and BCRP Transporters: Jakavi can affect the action of drugs that are moved by transporters such as P-glycoprotein and breast cancer resistance protein (BCRP). This might increase the levels of drugs like digoxin and rosuvastatin.
- CYP3A4 Substrates: Jakavi does not significantly alter the levels of other drugs metabolized by CYP3A4, like midazolam, so their effectiveness remains unchanged when taken together.
- Oral Contraceptives: Jakavi does not interfere with the effectiveness of oral contraceptives containing ethinylestradiol and levonorgestrel, so these birth control methods remain effective.
- Haematopoietic Growth Factors: There is limited information on how Jakavi interacts with haematopoietic growth factors, which stimulate blood cell production. It’s unclear if Jakavi affects their efficacy or vice versa.
- Cytoreductive Therapies: The safety and effectiveness of using Jakavi with other drugs that reduce blood cell counts are not well established, so combining them should be done cautiously.
Alternative Medications
Here are some good alternatives to Jakavi:
- Hydroxyurea
- Jakafi (Ruxolitinib)
- Besremi (Ropeginterferon alfa-2b)
- Peginterferon alfa-2a
Cost & Coupons
In the United States, 5mg of Jakavi can cost Americans up to $16,000 for 56 tablets, which breaks down to about $285.71 per tablet. At Pharma Giant, we offer significant savings and provide Jakavi at a fraction of this cost.
Jakavi Pricing Table
| Strength | Quantity | Pharma Giant Price | Price Per Tablet |
|---|---|---|---|
| 5mg | 56 tablets | $5,900 | $105.36 |
| 112 tablets | $11,740 | $104.82 | |
| 168 tablets | $17,400 | $103.57 | |
| 10mg | 56 tablets | $5,950 | $106.25 |
| 112 tablets | $11,840 | $105.71 | |
| 168 tablets | $17,670 | $105.24 | |
| 15mg | 56 tablets | $6,000 | $107.14 |
| 112 tablets | $11,940 | $106.61 | |
| 168 tablets | $17,820 | $106.07 | |
| 20mg | 56 tablets | $6,050 | $108.04 |
| 112 tablets | $12,040 | $107.50 | |
| 168 tablets | $17,970 | $106.96 |
Exclusive Discount Offer
Coupon Code: Use PGSAVE10 at checkout to enjoy a 10% discount on your Jakavi purchase. This offer is valid for first-time orders and is applicable once per customer.
Ordering Information
- Prescription Required: Jakavi can only be purchased with a valid prescription.
- Bulk Purchases: Patients can order up to a 90-day supply, making it convenient for long-term treatment plans.
- Fast Delivery: We ensure quick and reliable shipping to your location, so you receive your medication without delay.
How to Order
- Select your desired strength and quantity from the pricing table above.
- Enter the coupon code at checkout to receive your discount.
- Proceed with the secure payment process to complete your order.
By choosing Pharma Giant, you can access Jakavi at significantly lower prices compared to typical U.S. costs. Take advantage of our exclusive discounts and offers today!
Frequently Asked Questions
Disclaimer
Pharma Giant provides medical information to help you better understand medications and medical conditions.This content is for informational use only and does not replace advice from a licensed medical practitioner. Consult your doctor or pharmacist before starting or changing any medication. All our partners follow strict safety standards set by their country’s health authorities to make sure you receive safe and high-quality medications.
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