What is Doptelet (avatrombopag), and what is it used for?
Doptelet is a prescription medicine used to treat low blood platelet counts in adults with:
- long-lasting (chronic) liver disease (CLD) who are scheduled to have a medical or dental procedure.
- chronic immune thrombocytopenia (ITP) when other treatments have not worked well enough.
Doptelet is not used to make platelet counts normal in adults with chronic liver disease or chronic immune thrombocytopenia.
It is not known if Doptelet is safe and effective in children.
What are the side effects of Doptelet?
Doptelet may cause serious side effects, including:
Blood clots. People with chronic liver disease or chronic immune thrombocytopenia and people with certain blood clotting conditions may have an increased risk of developing blood clots. Tell your healthcare provider right away if you have signs and symptoms of a blood clot, including:
- swelling, pain, or tenderness in your legs
- fast heartbeat
- shortness of breath
- stomach (abdominal) pain or tenderness
- chest pain
- severe headache
- slurred speech, facial droop, arm or leg weakness, or severe dizziness
The most common side effects of Doptelet when used to treat low blood platelet counts in adults with chronic liver disease (CLD) who are scheduled to have a medical or dental procedure are:
The most common side effects of Doptelet when used to treat low blood platelet counts in adults with chronic immune thrombocytopenia (ITP) are:
- joint pain
- bleeding gums
- purple or red spots on your skin
- runny nose
- upper respiratory tract infection
These are not all of the possible side effects of Doptelet.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
What is the dosage for Doptelet?
Recommended Dosage For Patients With Chronic Liver Disease
Begin Doptelet dosing 10 to 13 days prior to the scheduled procedure. The recommended daily dose of Doptelet is based on the patient’s platelet count prior to the scheduled procedure (see Table 1). Patients should undergo their procedure 5 to 8 days after the last dose of Doptelet.
Doptelet should be taken orally once daily for 5 consecutive days with food. In the case of a missed dose, patients should take the next dose of Doptelet as soon as they remember. Patients should not take two doses at one time to make up for a missed dose, and should take the next dose at the usual time the next day; all 5 days of dosing should be completed.
Table 1: Recommended Dose and Duration in Patients with Chronic Liver Disease Scheduled to Undergo a Procedure
|Platelet Count (×109/L)||Once Daily Dose||Duration|
|Less than 40||60 mg (3 tablets)||5 days|
|40 to less than 50||40 mg (2 tablets)||5 days|
Doptelet has been investigated only as a single 5-day once daily dosing regimen in clinical trials in patients with chronic liver disease. Doptelet should not be administered to patients with chronic liver disease in an attempt to normalize platelet counts.
Obtain a platelet count prior to administration of Doptelet therapy and on the day of a procedure to ensure an adequate increase in platelet count.
Recommended Dosage For Patients With Chronic Immune Thrombocytopenia
Use the lowest dose of Doptelet needed to achieve and maintain a platelet count greater than or equal to 50×109/L as necessary to reduce the risk for bleeding. Dose adjustments are based on platelet count response. Do not use Doptelet to normalize platelet counts.
Initial Dose Regimen
Begin Doptelet at a starting dose of 20 mg (1 tablet) once daily with food.
After initiating therapy with Doptelet, assess platelet counts weekly until a stable platelet count greater than or equal to 50×109/L has been achieved, and then obtain platelet counts monthly thereafter. Obtain platelet counts weekly for at least 4 weeks following discontinuation of Doptelet.
Dose adjustments (see Table 2 and Table 3) are based on the platelet count response. Do not exceed a daily dose of 40 mg (2 tablets).
Table 2: Doptelet Dose Adjustments for Patients with Chronic Immune Thrombocytopenia
|Platelet Count (×109 /L)||Dose Adjustment or Action|
|Less than 50 after at least 2 weeks of Doptelet||
|Between 200 and 400||
|Greater than 400||
|Less than 50 after 4 weeks of Doptelet 40 mg once daily||
|Greater than 400 after 2 weeks of Doptelet 20 mg weekly||
Table 3: Doptelet Dose Levels for Titration in Patients with Chronic Immune Thrombocytopenia
|40 mg Once Daily||6|
|40 mg Three Times a Week AND 20 mg on the Four Remaining Days of Each Week||5|
|20 mg Once Daily*||4|
|20 mg Three Times a Week||3|
|20 mg Twice a Week OR 40 mg Once Weekly||2|
|20 mg Once Weekly||1|
|*Initial dose regimen for all patients except those taking Moderate or Strong Dual Inducers or Moderate or Strong Dual Inhibitors of CYP2C9 and CYP3A4.|
In the case of a missed dose, patients should take the missed dose of Doptelet as soon as they remember. Patients should not take two doses at one time to make up for a missed dose, and should take the next dose per the current regimen.
Discontinue Doptelet if the platelet count does not increase to greater than or equal to 50×109 /L after 4 weeks of dosing at the maximum dose of 40 mg once daily. Discontinue Doptelet if the platelet count is greater than 400×109 /L after 2 weeks of dosing at 20 mg once weekly.
Recommended Dosage With Concomitant Moderate Or Strong Dual Inducers Or Inhibitors Of CYP2C9 And CYP3A4 In Patients With Chronic Immune Thrombocytopenia
The recommended starting doses of Doptelet in patients with chronic immune thrombocytopenia receiving concomitant medications are summarized in Table 4.
Table 4:Doptelet Recommended Starting Dose for Patients with Chronic Immune Thrombocytopenia Based on Concomitant Medications
|Concomitant Medications||Recommended Starting Dose|
|Moderate or strong dual inhibitors of CYP2C9 and CYP3A4||20 mg (1 tablet) three times a week|
|Moderate or strong dual inducers of CYP2C9 and CYP3A4||40 mg (2 tablets) once daily|
What drugs interact with Doptelet?
Effect Of Other Drugs On Doptelet In Patients With Chronic Immune Thrombocytopenia
Moderate Or Strong Dual Inhibitors Of CYP2C9 And CYP3A4
- Concomitant use with a moderate or strong dual inhibitor of CYP2C9 and CYP3A4 increases avatrombopag AUC, which may increase the risk of Doptelet toxicities. Reduce the starting dosage of Doptelet when used concomitantly with a moderate or strong dual inhibitor of CYP2C9 and CYP3A4 (see Table 4).
- In patients starting moderate or strong dual inhibitors of CYP2C9 and CYP3A4 while receiving Doptelet, monitor platelet counts and adjust Doptelet dose as necessary (see Table 3).
Moderate Or Strong Dual Inducers Of CYP2C9 And CYP3A4
- Concomitant use with a moderate or strong dual inducer of CYP2C9 and CYP3A4 decreases avatrombopag AUC which may reduce Doptelet efficacy. Increase the recommended starting dosage of Doptelet when used concomitantly with a moderate or strong dual inducer of CYP2C9 and CYP3A4 (see Table 4).
- In patients starting moderate or strong dual inducers of CYP2C9 and CYP3A4 while receiving Doptelet, monitor platelet counts and adjust Doptelet dose as necessary (see Table 3).
Patients with Chronic Liver Disease
- No dosage adjustments are required for patients with chronic liver disease.
Doptelet pregnancy and breastfeeding safety
- Based on findings from animal reproduction studies, Doptelet may cause fetal harm when administered to a pregnant woman. The available data on Doptelet in pregnant women are insufficient to inform a drug-associated risk of adverse developmental outcomes.
- There is no information regarding the presence of avatrombopag in human milk, the effects on the breastfed child, or the effects on milk production. Avatrombopag was present in the milk of lactating rats. When a drug is present in animal milk, it is likely the drug will be present in human milk. Due to the potential for serious adverse reactions in a breastfed child from Doptelet, breastfeeding is not recommended during treatment with Doptelet and for at least 2 weeks after the last dose
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Doptelet is a prescription medicine used to treat low blood platelet counts in adults with long-lasting (chronic) liver disease (CLD) or chronic immune thrombocytopenia (ITP). Serious side effects of Doptelet include blood clots.
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