DRUG INTERACTIONS - summary

 Strong and moderate CYP3A Inducers: Avoid concomitant use of PEMAZYRE. (

 Strong and moderate- CYP3A inhibitors:

 DRUG INTERACTIONS- details

1. Effect of Other Drugs on PEMAZYRE Strong and Moderate CYP3A Inducers-                                                                                                                                               Concomitant use of PEMAZYRE with a strong or moderate CYP3A inducer decreases pemigatinib plasma concentrations,  which may reduce the efficacy of PEMAZYRE.

Avoid concomitant use of strong and moderate CYP3A inducers with PEMAZYRE.

Strong and Moderate CYP3A Inhibitors-                                                                Concomitant use of a strong or moderate CYP3A inhibitor with PEMAZYRE increases pemigatinib plasma concentrations, which may increase the incidence and severity of adverse reactions.

Reduce PEMAZYRE dose if concomitant use of strong and moderate CYP3A inhibitors cannot be avoided 

U.S. FDA APPROVED  DRUGS DURING 2020

Sr.No-  14

ADVERSE REACTIONS

The most common adverse reactions (incidence = 20%) are hyperphosphatemia, alopecia, diarrhea, nail toxicity, fatigue, dysgeusia, nausea, constipation, stomatitis, dry eye, dry mouth, decreased appetite, vomiting, arthralgia, abdominal pain, hypophosphatemia, back pain, and dry skin.

PATIENT COUNSELING INFORMATION

Advise the patient to read the FDA-approved patient labeling (Patient Information).

Ocular Toxicity -                                                                                                                          Advise patients that PEMAZYRE may cause ocular toxicity including RPED and to immediately inform their healthcare provider if they experience any visual changes.               Also advise patients that they should use artificial tear or substitutes, hydrating or lubricating eye gels in order to prevent or treat dry eyes 

Hyperphosphatemia -                                                                                                                  Inform patients that they may experience increase in phosphate levels and of the need to monitor serum phosphate levels.

They should immediately inform their healthcare provider of any symptoms related to acute change in phosphate levels such as muscle cramps, numbness, or tingling around the mouth  

Nail Disorders-                                                                                                                         Advise patients that PEMAZYRE may cause nail disorders  

Embryo-Fetal Toxicity-                                                                                                             Advise females to inform their healthcare provider if they are pregnant or become pregnant. Inform female patients of the risk to a fetus and potential loss of pregnancy

 Advise females of reproductive potential to use effective contraception during treatment with PEMAZYRE and for 1 week after the final dose.

 Advise males with female partners of reproductive potential or who are pregnant to use effective contraception during treatment and for 1 week after receiving the final dose of PEMAZYRE

Lactation-                                                                                                                                    Advise patients not to breastfeed during treatment with PEMAZYRE and for 1 week after the final dose 

Administration -                                                                                                                         Instruct patients do not crush, chew, split or dissolve tablets. 

Instruct patients if they miss a dose by 4 or more hours or if they vomit after taking a dose, resume dosing with the next scheduled dose.

Extra tablets should not be taken to make up for the missed dose

Drug Interactions-                                                                                                                      Advise patients to inform their healthcare providers of all concomitant medications, herbal and dietary supplements. Advise patients to avoid grapefruit products during treatment with PEMAZYRE 

Manufactured for: Incyte Corporation Wilmington, DE 19803 PEMAZYRE is a trademark of Incyte Corporation. U.S. Patent Nos. 9,611,267 and 10,131,667 © 2020 Incyte Corporation. All rights reserved.

. CLINICAL PHARMACOLOGY

1. Mechanism of Action-                                                                                                     Pemigatinib is a small molecule kinase inhibitor that targets FGFR1, 2 and 3 with IC50 values of less than 2 nM. Pemigatinib also inhibited FGFR4 in vitro at a concentration approximately 100 times higher than those that inhibit FGFR1, 2, and 3.

2. Pharmacodynamics -Cardiac Electrophysiology-                                                              At a dose 1.5 times the maximum recommended dose, PEMAZYRE does not result in a large mean increase (i.e. >20 ms) of the QTc interval. Serum Phosphate

Pemigatinib increased serum phosphate levels as a consequence of FGFR inhibition. In patients, the increase in serum phosphate observed after treatment with pemigatinib was exposuredependent across the dose range of 1 to 20 mg once daily (0.07 to 1.5 times the recommended dose), with increased risk of hyperphosphatemia with higher pemigatinib exposure.

3. Pharmacokinetics -The geometric mean steady-state pemigatinib AUC0-24h was 2620 nM·h (54% CV) and Cmax was 236 nM (56% CV) for 13.5 mg orally once daily.

Steady state pemigatinib concentrations increased proportionally over the dose range of 1 to 20 mg (0.07 to 1.5 times the recommended dose). Steady-state was achieved within 4 days following repeated once daily dosing.

With repeated once daily dosing, pemigatinib accumulated with a median accumulation ratio of 1.63 (range 0.63 to 3.28). Absorption The median time to achieve peak pemigatinib plasma concentration (Tmax) was 1.13 (0.50-6.00) hours

 Effect of Food-                                                                                                                              Administration of PEMAZYRE with a high-fat and high-calorie meal (approximately 1000 calories with 150 calories from protein, 250 calories from carbohydrate, and 500-600 calories from fat) had no clinically meaningful effect on pemigatinib pharmacokinetics.

Distribution -                                                                                                                          The estimated apparent volume of distribution was 235 L (60.8%) following a 13.5 mg oral dose. In vitro, pemigatinib was 90.6% bound to human plasma proteins at concentrations ranging from 1 to 10 µM.

Elimination-                                                                                                                              The geometric mean elimination half-life (t½) of pemigatinib was 15.4 (51.6% CV) hours and the geometric mean apparent clearance (CL/F) was 10.6 L/h (54% CV).

Metabolism-                                                                                                                            Pemigatinib is predominantly metabolized by CYP3A4 in vitro. The major drug-related moiety in plasma was unchanged pemigatinib in a human [14C] mass balance study.

Excretion-                                                                                                                                Following a single oral 11 mg dose of radiolabeled pemigatinib, 82.4% of the dose was recovered in feces (1.4% as unchanged) and 12.6% in urine (1% as unchanged).

Specific Populations                                                                                                                    No clinically meaningful differences in the systemic exposure of pemigatinib were observed based on age (21 - 79 years), sex, race/ethnicity, body weight (39.8 - 156 kg), mild to moderate renal impairment, or mild to moderate hepatic impairment.

The effect of severe renal impairment, renal dialysis in end-stage renal disease, or severe hepatic impairment on pemigatinib exposure is unknown.

Drug Interaction Studies

Clinical Studies and Model-Based Approaches Effect of CYP3A Inhibitors on Pemigatinib: Itraconazole, a strong CYP3A inhibitor, increased Cmax by 17% and increased AUC by 88% following a single oral PEMAZYRE dose of 4.5 mg  

Concomitant use of moderate CYP3A inhibitors is predicted to increase pemigatinib exposure by approximately 50-80% )].

Effect of CYP3A Inducers on Pemigatinib: Rifampin, a strong CYP3A inducer, decreased pemigatinib Cmax by 62% and AUC by 85% following a single oral PEMAZYRE dose of 13.5 mg YP3A inducer is predicted to decrease pemigatinib exposure by more than 50% 

Effect of Acid-Lowering Agents on Pemigatinib: Esomeprazole, a proton pump inhibitor, decreased pemigatinib Cmax by 35% and AUC by 8% following a single oral PEMAZYRE dose of 13.5 mg; these differences are not expected to be clinically meaningful. Ranitidine, a histamine-2 antagonist, did not affect pemigatinib exposure.

Other Drugs:                                                                                                                            No clinically significant differences in glucose levels were observed when metformin (OCT2/MATE1 substrate) was co-administered with pemigatinib

. USE IN SPECIFIC POPULATIONS-

1. Pregnancy Risk Summary -                                                                                              Based on findings in an animal study and its mechanism of action, PEMAZYRE can cause fetal harm or loss of pregnancy when administered to a pregnant woman 

There are no available data on the use of PEMAZYRE in pregnant women.

Advise pregnant women of the potential risk to a fetus.

In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.

2. Lactation Risk Summary -                                                                                            There are no data on the presence of pemigatinib or its metabolites in human milk or their effects on either the breastfed child or on milk production.

Because of the potential for serious adverse reactions in breastfed children from PEMAZYRE, advise women not to breastfeed during treatment and for 1 week after the final dose.

3. Females and Males of Reproductive Potential Pregnancy Testing-                              Verify pregnancy status of females of reproductive potential prior to initiating PEMAZYRE

. Contraception-                                                                                                                   PEMAZYRE can cause fetal harm when administered to pregnant women

 Females-                                                                                                                                      Advise females of reproductive potential to use effective contraception during treatment with PEMAZYRE and for 1 week after the final dose.

Males -                                                                                                                                         Advise males with female partners of reproductive potential to use effective contraception during treatment with PEMAZYRE and for 1 week after the final dose.

4. Pediatric Use -                                                                                                                       The safety and effectiveness of PEMAZYRE have not been established in pediatric patients.

5. Geriatric Use-                                                                                                               I        32% of patients were 65 years and older, and 8% of patients were 75 years and older.     No overall differences in safety or effectiveness were observed between these patients and younger patients. 

6. Renal Impairment-                                                                                                                t No dose adjustment is recommended for patients with mild or moderate renal impairment (glomerular filtration rate (GFR) = 30 to <90 mL/min estimated by Modification of Diet in Renal Disease (MDRD) equation).

The recommended dose of PEMAZYRE has not been established for patients with severe renal impairment (GFR <30 mL/min)

7. Hepatic Impairment-                                                                                                                    No dose adjustment is recommended for patients with mild (total bilirubin > upper limit of normal (ULN) to 1.5 × ULN or AST > ULN) or moderate hepatic impairment (total bilirubin >1.5–3 × ULN with any AST).

The recommended dose of PEMAZYRE has not been established for patients with severe hepatic impairment (total bilirubin >3 × ULN with any AST)