Promacta Dosage

Generic name: ELTROMBOPAG OLAMINE 12.5mg
Dosage form: tablet, film coated
Drug class: Platelet-stimulating agents

Medically reviewed by Drugs.com. Last updated on Jul 23, 2024.

Persistent or Chronic Immune Thrombocytopenia

Use the lowest dose of PROMACTA to achieve and maintain a platelet count greater than or equal to 50 x 109/L as necessary to reduce the risk for bleeding. Dose adjustments are based upon the platelet count response. Do not use PROMACTA to normalize platelet counts. In clinical trials, platelet counts generally increased within 1 to 2 weeks after starting PROMACTA and decreased within 1 to 2 weeks after discontinuing PROMACTA.

Initial Dose Regimen:

Adult and Pediatric Patients 6 Years and Older with ITP: Initiate PROMACTA at a dose of 50 mg once daily, except in patients who are of East-/Southeast-Asian ancestry or who have mild to severe hepatic impairment (Child-Pugh class A, B, C).

For patients of East-/Southeast-Asian ancestry with ITP, initiate PROMACTA at a reduced dose of 25 mg once daily.

For patients with ITP and mild, moderate, or severe hepatic impairment (Child-Pugh class A, B, C), initiate PROMACTA at a reduced dose of 25 mg once daily.

For patients of East-/Southeast-Asian ancestry with ITP and hepatic impairment (Child-Pugh class A, B, C), consider initiating PROMACTA at a reduced dose of 12.5 mg once daily.

Pediatric Patients with ITP Aged 1 to 5 Years: Initiate PROMACTA at a dose of 25 mg once daily.

Monitoring and Dose Adjustment: After initiating PROMACTA, adjust the dose to achieve and maintain a platelet count greater than or equal to 50 x 109/L as necessary to reduce the risk for bleeding. Do not exceed a dose of 75 mg daily. Monitor clinical hematology and liver tests regularly throughout therapy with PROMACTA and modify the dosage regimen of PROMACTA based on platelet counts as outlined in Table 1. During therapy with PROMACTA, assess complete blood counts (CBCs) with differentials, including platelet counts, weekly until a stable platelet count has been achieved. Obtain CBCs with differentials, including platelet counts, monthly thereafter.

When switching between the oral suspension and tablet, assess platelet counts weekly for 2 weeks, and then follow standard monthly monitoring.

Table 1. Dose Adjustments of PROMACTA in Patients With Persistent or Chronic Immune Thrombocytopenia
Platelet count result	Dose adjustment or response
< 50 x 109/L following at least 2 weeks of PROMACTA	Increase daily dose by 25 mg to a maximum of 75 mg/day. For patients taking 12.5 mg once daily, increase the dose to 25 mg daily before increasing the dose amount by 25 mg.
≥ 200 x 109/L to ≤ 400 x 109/L at any time	Decrease the daily dose by 25 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments. For patients taking 25 mg once daily, decrease the dose to 12.5 mg once daily.
> 400 x 109/L	Stop PROMACTA; increase the frequency of platelet monitoring to twice weekly. Once the platelet count is < 150 x 109/L, reinitiate therapy at a daily dose reduced by 25 mg. For patients taking 25 mg once daily, reinitiate therapy at a daily dose of 12.5 mg.
> 400 x 109/L after 2 weeks of therapy at lowest dose of PROMACTA	Discontinue PROMACTA.

In patients with ITP and hepatic impairment (Child-Pugh class A, B, C), after initiating PROMACTA or after any subsequent dosing increase, wait 3 weeks before increasing the dose.

Modify the dosage regimen of concomitant ITP medications, as medically appropriate, to avoid excessive increases in platelet counts during therapy with PROMACTA. Do not administer more than one dose of PROMACTA within any 24-hour period.

Discontinuation: Discontinue PROMACTA if the platelet count does not increase to a level sufficient to avoid clinically important bleeding after 4 weeks of therapy with PROMACTA at the maximum daily dose of 75 mg. Excessive platelet count responses, as outlined in Table 1, or important liver test abnormalities also necessitate discontinuation of PROMACTA. Obtain CBCs with differentials, including platelet counts, weekly for at least 4 weeks following discontinuation of PROMACTA.

Chronic Hepatitis C-Associated Thrombocytopenia

Use the lowest dose of PROMACTA to achieve and maintain a platelet count necessary to initiate and maintain antiviral therapy with pegylated interferon and ribavirin. Dose adjustments are based upon the platelet count response. Do not use PROMACTA to normalize platelet counts. In clinical trials, platelet counts generally began to rise within the first week of treatment with PROMACTA.

Initial Dose Regimen: Initiate PROMACTA at a dose of 25 mg once daily.

Monitoring and Dose Adjustment: Adjust the dose of PROMACTA in 25-mg increments every 2 weeks as necessary to achieve the target platelet count required to initiate antiviral therapy. Monitor platelet counts every week prior to starting antiviral therapy.

During antiviral therapy, adjust the dose of PROMACTA to avoid dose reductions of peginterferon. Monitor CBCs with differentials, including platelet counts, weekly during antiviral therapy until a stable platelet count is achieved. Monitor platelet counts monthly thereafter. Do not exceed a dose of 100 mg daily. Monitor clinical hematology and liver tests regularly throughout therapy with PROMACTA.

For specific dosage instructions for peginterferon or ribavirin, refer to their respective prescribing information.

Table 2. Dose Adjustments of PROMACTA in Adults With Thrombocytopenia Due to Chronic Hepatitis C
Platelet count result	Dose adjustment or response
< 50 x 109/L following at least 2 weeks of PROMACTA	Increase daily dose by 25 mg to a maximum of 100 mg/day.
≥ 200 x 109/L to ≤ 400 x 109/L at any time	Decrease the daily dose by 25 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments.
> 400 x 109/L	Stop PROMACTA; increase the frequency of platelet monitoring to twice weekly. Once the platelet count is < 150 x 109/L, reinitiate therapy at a daily dose reduced by 25 mg. For patients taking 25 mg once daily, reinitiate therapy at a daily dose of 12.5 mg.
> 400 x 109/L after 2 weeks of therapy at lowest dose of PROMACTA	Discontinue PROMACTA.

Discontinuation: The prescribing information for pegylated interferon and ribavirin include recommendations for antiviral treatment discontinuation for treatment futility. Refer to pegylated interferon and ribavirin prescribing information for discontinuation recommendations for antiviral treatment futility.

PROMACTA should be discontinued when antiviral therapy is discontinued. Excessive platelet count responses, as outlined in Table 2, or important liver test abnormalities also necessitate discontinuation of PROMACTA.

Severe Aplastic Anemia

First-Line Severe Aplastic Anemia

Initiate PROMACTA concurrently with standard immunosuppressive therapy.

Initial Dose Regimen

The recommended initial dose regimen is listed in Table 3. Do not exceed the initial dose of PROMACTA.

Table 3. Recommended Initial PROMACTA Dose Regimen in the First-Line Treatment of Severe Aplastic Anemia
Age	Dose regimen
Patients 12 years and older	150 mg once daily for 6 months
Pediatric patients 6 to 11 years	75 mg once daily for 6 months
Pediatric patients 2 to 5 years	2.5 mg/kg once daily for 6 months

For patients with severe aplastic anemia of East-/Southeast-Asian ancestry or those with mild, moderate, or severe hepatic impairment (Child-Pugh class A, B, C), decrease the initial PROMACTA dose by 50% as listed in Table 4.

If baseline alanine aminotransferase (ALT) or aspartate aminotransferase (AST) levels are > 6 x upper limit of normal (ULN), do not initiate PROMACTA until transaminase levels are < 5 x ULN. Determine the initial dose for these patients based on Table 3 or Table 4.

Table 4. Recommended Initial PROMACTA Dose Regimen for Patients of East-/Southeast-Asian Ancestry or Those With Mild, Moderate, or Severe Hepatic Impairment (Child-Pugh class A, B, C) in the First-Line Treatment of Severe Aplastic Anemia
Age	Dose regimen
Patients 12 years and older	75 mg once daily for 6 months
Pediatric patients 6 to 11 years	37.5 mg once daily for 6 months
Pediatric patients 2 to 5 years	1.25 mg/kg once daily for 6 months

Monitoring and Dose Adjustment for PROMACTA: Perform clinical hematology and liver tests regularly throughout therapy with PROMACTA.

Modify the dosage regimen of PROMACTA based on platelet counts as outlined in Table 5.

Table 5. Dose Adjustments of PROMACTA for Elevated Platelet Counts in the First-Line Treatment of Severe Aplastic Anemia
Platelet count result	Dose adjustment or response
> 200 x 109/L to ≤ 400 x 109/L	Decrease the daily dose by 25 mg every 2 weeks to lowest dose that maintains platelet count ≥ 50 x 109/L. In pediatric patients under 12 years of age, decrease the dose by 12.5 mg.
> 400 x 109/L	Discontinue PROMACTA for one week. Once the platelet count is < 200 x 109/L, reinitiate PROMACTA at a daily dose reduced by 25 mg (or 12.5 mg in pediatric patients under 12 years of age).

Table 6 summarizes the recommendations for dose interruption, reduction, or discontinuation of PROMACTA in the management of elevated liver transaminase levels and thromboembolic events.

Table 6. Recommended Dose Modifications for PROMACTA for ALT or AST Elevations and Thromboembolic Events
Abbreviations: ALT, alanine aminotransferase; AST, aspartate aminotransferase; ULN, upper limit of normal.
Event	Recommendation
ALT or AST elevations	Increase in ALT or AST > 6 x ULN Discontinue PROMACTA. Once ALT or AST is < 5 x ULN, reinitiate PROMACTA at the same dose. Increase in ALT or AST > 6 x ULN after reinitiating PROMACTA Discontinue PROMACTA and monitor ALT or AST at least every 3 to 4 days. Once ALT or AST is < 5 x ULN, reinitiate PROMACTA at a daily dose reduced by 25 mg compared to the previous dose. If ALT or AST returns to > 6 x ULN on the reduced dose Reduce the daily dose of PROMACTA by 25 mg until ALT or AST is < 5 x ULN. In pediatric patients under 12 years of age, reduce the daily dose by at least 15% to the nearest dose that can be administered.
Thromboembolic events (e.g., deep vein thrombosis, pulmonary embolus, stroke, myocardial infarction)	Discontinue PROMACTA but remain on horse antithymocyte globulin (h-ATG) and cyclosporine.

The total duration of PROMACTA treatment is 6 months.

Refractory Severe Aplastic Anemia

Use the lowest dose of PROMACTA to achieve and maintain a hematologic response. Dose adjustments are based upon the platelet count. Hematologic response requires dose titration, generally up to 150 mg, and may take up to 16 weeks after starting PROMACTA.

Initial Dose Regimen: Initiate PROMACTA at a dose of 50 mg once daily.

For patients with severe aplastic anemia of East-/Southeast-Asian ancestry or those with mild, moderate, or severe hepatic impairment (Child-Pugh class A, B, C), initiate PROMACTA at a reduced dose of 25 mg once daily.

Monitoring and Dose Adjustment: Adjust the dose of PROMACTA in 50-mg increments every 2 weeks as necessary to achieve the target platelet count greater than or equal to 50 x 109/L as necessary. Do not exceed a dose of 150 mg daily. Monitor clinical hematology and liver tests regularly throughout therapy with PROMACTA and modify the dosage regimen of PROMACTA based on platelet counts as outlined in Table 7.

Table 7. Dose Adjustments of PROMACTA in Patients With Refractory Severe Aplastic Anemia
Platelet count result	Dose adjustment or response
< 50 x 109/L following at least 2 weeks of PROMACTA	Increase daily dose by 50 mg to a maximum of 150 mg/day. For patients taking 25 mg once daily, increase the dose to 50 mg daily before increasing the dose amount by 50 mg.
≥ 200 x 109/L to ≤ 400 x 109/L at any time	Decrease the daily dose by 50 mg. Wait 2 weeks to assess the effects of this and any subsequent dose adjustments.
> 400 x 109/L	Stop PROMACTA for 1 week. Once the platelet count is < 150 x 109/L, reinitiate therapy at a dose reduced by 50 mg.
> 400 x 109/L after 2 weeks of therapy at lowest dose of PROMACTA	Discontinue PROMACTA.

For patients who achieve tri-lineage response, including transfusion independence, lasting at least 8 weeks: the dose of PROMACTA may be reduced by 50%. If counts remain stable after 8 weeks at the reduced dose, then discontinue PROMACTA and monitor blood counts. If platelet counts drop to less than 30 x 109/L, hemoglobin to less than 9 g/dL, or absolute neutrophil count (ANC) to less than 0.5 x 109/L, PROMACTA may be reinitiated at the previous effective dose.

Discontinuation: If no hematologic response has occurred after 16 weeks of therapy with PROMACTA, discontinue therapy. If new cytogenetic abnormalities are observed, consider discontinuation of PROMACTA. Excessive platelet count responses (as outlined in Table 7) or important liver test abnormalities also necessitate discontinuation of PROMACTA.

Administration

Administration of Tablets and Oral Suspension: Take PROMACTA without a meal or with a meal low in calcium (≤ 50 mg). Take PROMACTA at least 2 hours before or 4 hours after other medications (e.g., antacids), calcium-rich foods (containing > 50 mg calcium e.g., dairy products, calcium-fortified juices, and certain fruits and vegetables), or supplements containing polyvalent cations, such as iron, calcium, aluminum, magnesium, selenium, and zinc.

Do not split, chew, or crush tablets and mix with food or liquids.

Preparation of the Oral Suspension: Prior to use of the oral suspension, ensure patients or caregivers receive training on proper dosing, preparation, and administration of PROMACTA for oral suspension.

Administer the oral suspension immediately after preparation. Discard any suspension not administered within 30 minutes after preparation.

Prepare the suspension with water only. NOTE: Do not use hot water to prepare the suspension.

For details on preparation and administration of the suspension, including the recommended duration of use of each oral dosing syringe,.