Fibrodysplasia ossificans progressiva

Active Ingredient: Palovarotene

Indication for Palovarotene

Population group: only children (1 year - 12 years old) , adolescents (12 years - 18 years old) , adults (18 years old or older)
Therapeutic intent: Curative procedure

Palovarotene is indicated for the reduction in volume of new heterotopic ossification in adults and pediatric patients aged 8 years and older for females and 10 years and older for males with fibrodysplasia ossificans progressiva (FOP).

For this indication, competent medicine agencies globally authorize below treatments:

For patients 8-13 years old 2.5-5 mg once daily based on sex and body weight and for patients ≥14 years old 5 mg once daily

For:

Dosage regimens

Regimen A: In case that patient is female and patient age in years is ≥ 8 and patient age in years is ≤ 13 and patient weight is ≥ 10 kg and patient weight is ≤ 19.9 kg, oral, 2.5 milligrams palovarotene, once daily to meals.

Regimen B: In case that patient is female and patient age in years is ≥ 8 and patient age in years is ≤ 13 and patient weight is ≥ 20 kg and patient weight is ≤ 39.9 kg, oral, 3 milligrams palovarotene, once daily to meals.

Regimen C: In case that patient is female and patient age in years is ≥ 8 and patient age in years is ≤ 13 and patient weight is ≥ 40 kg and patient weight is ≤ 59.9 kg, oral, 4 milligrams palovarotene, once daily to meals.

Regimen D: In case that patient is female and patient age in years is ≥ 8 and patient age in years is ≤ 13 and patient weight is ≥ 60 kg, oral, 5 milligrams palovarotene, once daily to meals.

Regimen E: In case that patient is male and patient age in years is ≥ 10 and patient age in years is ≤ 13 and patient weight is ≥ 10 kg and patient weight is ≤ 19.9 kg, oral, 2.5 milligrams palovarotene, once daily to meals.

Regimen F: In case that patient is male and patient age in years is ≥ 10 and patient age in years is ≤ 13 and patient weight is ≥ 20 kg and patient weight is ≤ 39.9 kg, oral, 3 milligrams palovarotene, once daily to meals.

Regimen G: In case that patient is male and patient age in years is ≥ 10 and patient age in years is ≤ 13 and patient weight is ≥ 40 kg and patient weight is ≤ 59.9 kg, oral, 4 milligrams palovarotene, once daily to meals.

Regimen H: In case that patient is male and patient age in years is ≥ 10 and patient age in years is ≤ 13 and patient weight is ≥ 60 kg, oral, 5 milligrams palovarotene, once daily to meals.

Regimen I: In case that patient age in years is ≥ 14, oral, 5 milligrams palovarotene, once daily.

Detailed description

The recommended dosing for palovarotene includes a chronic daily dosage (daily dose) which can then be modified/increased in the event of FOP flare-up symptoms (flare-up dose).

Initiate flare-up treatment at the onset of the first symptom indicative of a FOP flare-up or substantial high-risk traumatic event likely to lead to a flare-up (e.g., surgery, intramuscular immunization, mandibular blocks for dental procedures, muscle fatigue, blunt muscle trauma from bumps, bruises, falls, or influenza-like viral illnesses). Symptoms of a FOP flare-up typically include but are not limited to localized pain, soft tissue swelling/inflammation, redness, warmth, decreased joint range of motion, and stiffness.

Recommended dosage for pediatric patients aged 8 to 13 years for females and aged 10 to 13 years for males

  • Daily Dose: The recommended palovarotene daily dosage for patients under 14 years of age is weight-based ranging from 2.5 mg to 5 mg daily (see Table 1). Stop daily dosing when flare-up dosing begins.
  • Flare-up Dose:
    • The recommended flare-up palovarotene dosage for patients under 14 years of age is weight-based (see Table 1). Administer the initial flare-up dosage once daily for 4 weeks, then administer the lower flare-up dosage once daily for 8 weeks (for a total of 12 weeks of flare-up treatment), even if symptoms resolve earlier, then return to daily dosing (see Table 1).
    • If during the course of flare-up treatment, the patient experiences marked worsening of the original flare-up site or another flare-up at a new location, restart the 12-week flare-up dosing with the Week 1 to 4 dose.
    • For flare-up symptoms that have not resolved at the end of the 12-week period, the Week 5 to 12 flare-up dose may be extended in 4-week intervals and continued until the flare-up symptoms resolve. If new flare-up symptoms occur after daily dosing is resumed, flare-up dosing may be restarted.

Table 1. Recommended palovarotene weight-based dosage for pediatric patients aged 8 to 13 years for females and 10 to 13 years for males*:

Weight Daily dosage Week 1 to 4
flare-up
dosage
Week 5 to 12
flare-up
dosage
10 kg to 19.9 kg 2.5 mg 10 mg 5 mg
20 kg to 39.9 kg 3 mg 12.5 mg 6 mg
40 kg to 59.9 kg 4 mg 15 mg 7.5 mg
≥60 kg 5 mg 20 mg 10 mg

* once daily

Recommended dosage for pediatric patients 14 years and older

  • Daily Dose: The recommended palovarotene daily dosage for pediatric patients 14 years and older is 5 mg daily. Stop daily dosing when flare-up dosing begins.
  • Flare-up Dose:
    • The recommended palovarotene flare-up dosage for pediatric patients 14 years and older is 20 mg daily for 4 weeks, followed by 10 mg daily for 8 weeks (for a total of 12 weeks of flare-up treatment), even if symptoms resolve earlier, then return to daily dosing of 5 mg.
    • If during the course of flare-up treatment, the patient experiences marked worsening of the original flare-up site or another flare-up at a new location, restart the 12-week flare-up dosing at 20 mg daily.
    • For flare-up symptoms that have not resolved at the end of the 12-week period, the 10 mg daily dosage may be extended in 4-week intervals and continued until the flare-up symptoms resolve. If new flare-up symptoms occur after the 5 mg daily dosing is resumed, flare-up dosing may be restarted.

Missed dose

If a dose of palovarotene is missed, take the missed dose as soon as possible. If the dose has been missed by more than 6 hours, skip the missed dose, and continue with the next scheduled dose. Do not take two doses at the same time or in the same day.

Dosage reduction for adverse reactions

If patients experience adverse reactions that require dosage reduction during either the palovarotene daily dosing or flare-up dosing, reduce the daily dosage to the next lower dose as shown in Table 2 at the discretion of the healthcare provider; reduce the dosage further if adverse reactions do not improve. If the patient is already receiving the lowest possible tolerated dose, then consider discontinuing palovarotene temporarily or permanently. Initiate subsequent flare-up dosing at the same reduced dose that was tolerated previously.

Table 2. Dose reduction of palovarotene for flare-up and chronic treatment:

Dose Prescribed Reduced Dose
20 mg 15 mg
15 mg 12.5 mg
12.5 mg 10 mg
10 mg 7.5 mg
7.5 mg 5 mg
6 mg 4 mg
5 mg 2.5 mg
4 mg 2 mg
3 mg 1.5 mg
2.5 mg 1 mg

Dosage considerations

Take palovarotene with food preferably at the same time each day.

Do not administer with grapefruit, pomelo, or juices containing these fruits.

5 mg once daily

For:

Dosage regimens

Oral, 5 milligrams palovarotene, once daily.

Detailed description

The recommended dosing for palovarotene includes a chronic daily dosage (daily dose) which can then be modified/increased in the event of FOP flare-up symptoms (flare-up dose).

Initiate flare-up treatment at the onset of the first symptom indicative of a FOP flare-up or substantial high-risk traumatic event likely to lead to a flare-up (e.g., surgery, intramuscular immunization, mandibular blocks for dental procedures, muscle fatigue, blunt muscle trauma from bumps, bruises, falls, or influenza-like viral illnesses). Symptoms of a FOP flare-up typically include but are not limited to localized pain, soft tissue swelling/inflammation, redness, warmth, decreased joint range of motion, and stiffness.

Recommended dosage for adults

  • Daily Dose: The recommended palovarotene daily dosage for adults is 5 mg daily. Stop daily dosing when flare-up dosing begins.
  • Flare-up Dose:
    • The recommended palovarotene flare-up dosage for adults is 20 mg daily for 4 weeks, followed by 10 mg daily for 8 weeks (for a total of 12 weeks of flare-up treatment), even if symptoms resolve earlier, then return to daily dosing of 5 mg.
    • If during the course of flare-up treatment, the patient experiences marked worsening of the original flare-up site or another flare-up at a new location, restart the 12-week flare-up dosing at 20 mg daily.
    • For flare-up symptoms that have not resolved at the end of the 12-week period, the 10 mg daily dosage may be extended in 4-week intervals and continued until the flare-up symptoms resolve. If new flare-up symptoms occur after the 5 mg daily dosing is resumed, flare-up dosing may be restarted.

Missed Dose

If a dose of palovarotene is missed, take the missed dose as soon as possible. If the dose has been missed by more than 6 hours, skip the missed dose, and continue with the next scheduled dose. Do not take two doses at the same time or in the same day.

Dosage reduction for adverse reactions

If patients experience adverse reactions that require dosage reduction during either the palovarotene daily dosing or flare-up dosing, reduce the daily dosage to the next lower dose as shown in the table below at the discretion of the healthcare provider; reduce the dosage further if adverse reactions do not improve. If the patient is already receiving the lowest possible tolerated dose, then consider discontinuing palovarotene temporarily or permanently. Initiate subsequent flare-up dosing at the same reduced dose that was tolerated previously.

Dose reduction of palovarotene for flare-up and chronic treatment:

Dose Prescribed Reduced Dose
20 mg 15 mg
15 mg 12.5 mg
12.5 mg 10 mg
10 mg 7.5 mg
7.5 mg 5 mg
6 mg 4 mg
5 mg 2.5 mg
4 mg 2 mg
3 mg 1.5 mg
2.5 mg 1 mg

Dosage considerations

Take palovarotene with food preferably at the same time each day.

Do not administer with grapefruit, pomelo, or juices containing these fruits.

Active ingredient

Palovarotene

In patients with fibrodysplasia ossificans progressiva (FOP), abnormal bone formation, including heterotrophic ossification (HO), is driven by a gain-of-function mutation in the bone morphogenetic protein (BMP) type I receptor ALK2 (ACVR1). Palovarotene is an orally bioavailable retinoic acid receptor agonist, with particular selectivity at the gamma subtype of RAR. Through binding to RARγ, palovarotene decreases the BMP/ALK2 downstream signaling pathway by inhibiting the phosphorylation of SMAD1/5/8, which reduces ALK2/SMAD-dependent chondrogenesis and osteocyte differentiation resulting in reduced endochondral bone formation.

Read more about Palovarotene

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