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What the label lists and what reports show

Glasdegib side effects

Glasdegib's FDA label: “Most common adverse reactions (incidence ≥20%) are anemia, fatigue, hemorrhage, febrile neutropenia, musculoskeletal pain, nausea, edema, thrombocytopenia, dyspnea, decreased appetite, dysgeusia, mucositis, constipation, and rash.” FAERS holds 468 reports naming it through July 30, 2026; the reaction reported most often, leaving out the conditions it is used for, product-use terms and outcomes, is febrile neutropenia (69 reports).

  • No generic listed
  • Boxed warning

Check it at the source: the glasdegib FDA label on DailyMed (effective December 12, 2025, Pfizer Laboratories Div Pfizer Inc); the FDA FAERS public dashboard.

What does the patient leaflet say about side effects?

From the patient leaflet: What are the possible side effects of DAURISMO?

DAURISMO can cause serious side effects, including: • See " What is the most important information I should know about DAURISMO? " • Changes in the electrical activity of your heart called QT prolongation. QT prolongation can cause irregular heartbeats that can be life-threatening. Tell your healthcare provider right away if you feel faint, lightheaded, dizzy, or feel your heart beating irregularly or fast during treatment with DAURISMO. • Muscle Problems. Muscle problems are common with DAURISMO, but can also sometimes be serious. DAURISMO can increase your risk of muscle pain or muscle spasms. Tell your healthcare provider right away if you develop any new or worsening muscle spasms, pain, tenderness or weakness during and after treatment with DAURISMO. […]

Source: FDA drug label, Pfizer Laboratories Div Pfizer Inc, effective December 12, 2025 (SPL set 204a6f7e-c9a4-472b-abd2-9527bda64d17), via openFDA; the full label on DailyMed

What does the label list?

From the label: adverse reactions

Most common adverse reactions (incidence ≥20%) are anemia, fatigue, hemorrhage, febrile neutropenia, musculoskeletal pain, nausea, edema, thrombocytopenia, dyspnea, decreased appetite, dysgeusia, mucositis, constipation, and rash.

Table 3. Adverse Reactions Occurring in ≥10% of Patients Adverse reactions with ≥10% incidence in the DAURISMO with low-dose cytarabine arm or the low-dose cytarabine arm are included. No Grade 5 events in the DAURISMO…

ReactionBody System All Grades %Adverse Reactions Grade ≥3 %DAURISMO With Low-Dose Cytarabine N=84 All Grades %Low-Dose Cytarabine N=41 Grade ≥3 %
Anemia43414237
Fatigue Fatigue includes asthenia and fatigue.3614327
Musculoskeletal pain Musculoskeletal pain includes pain in extremity, arthralgia, back…302172
Nausea291122
Dyspnea Dyspnea includes dyspnea, hypoxia, bronchospasm, and respiratory failure.2311247
Decrease appetite21172
Dysgeusia Dysgeusia includes dysgeusia and ageusia.21020
Rash Rash includes rash, pruritus, erythema, skin ulcer, rash maculo-papular, and rash…20272
Pneumonia Pneumonia includes pneumonia, pneumonia aspiration, and lung infection.19152422
Hyponatremia11600
Atrial arrhythmia Atrial arrhythmia includes atrial fibrillation, bradycardia,…13472
Renal insufficiency Renal insufficiency includes acute kidney injury, blood creatinine…195100

Rows and numbers as the label prints them, under its own column headings (the first rows of a longer table where it runs on). A reaction in a trial table is not necessarily caused by the medicine, and trials differ from everyday use.

From the label: adverse reactions, continued

The following clinically-significant adverse reactions are described elsewhere in the labeling: • QTc Interval Prolongation [see Warnings and Precautions (5.2) ] • Musculoskeletal Adverse Reactions [see Warnings and Precautions (5.3) ] Most common adverse reactions (incidence ≥20%) are anemia, fatigue, hemorrhage, febrile neutropenia, musculoskeletal pain, nausea, edema, thrombocytopenia, dyspnea, decreased appetite, dysgeusia, mucositis, constipation, and rash. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Pfizer, Inc. at 1-800-438-1985 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety profile of DAURISMO is based on experience in the BRIGHT AML 1003 study for 111 adults with newly-diagnosed AML and 14 adults with other conditions for which DAURISMO is not indicated [see Clinical Studies (14) ]. Patients were treated with DAURISMO 100 mg daily in combination with low-dose cytarabine (N=84) or low-dose cytarabine alone (N=41). …

Source: FDA drug label, Pfizer Laboratories Div Pfizer Inc, effective December 12, 2025 (SPL set 204a6f7e-c9a4-472b-abd2-9527bda64d17), via openFDA; the full label on DailyMed

What do FAERS reports show?

468 reports list glasdegib among the medicines taken, each a report of something that happened, not proof the medicine caused it; 190 are coded as a death and 224 as a hospital stay. Counts follow how widely a medicine is used and watched, and they are not a measure of how risky it is. Of the 19 reactions below, 14 are named by the same term (in US spelling) in the label's adverse reactions, warnings or patient leaflet; a reaction the label does not name may still be there under another word, and a report does not show that the medicine caused it.

The 25 most reported reactions

  • Death (an outcome recorded in the report)110
  • Febrile Neutropenia (named in the label)69
  • Pneumonia (named in the label)48
  • Off Label Use (a use or a product term, not a reaction)34
  • Neoplasm Progression28
  • Neutropenia (named in the label)22
  • Sepsis (named in the label)15
  • Toxicity To Various Agents13
  • Electrocardiogram Qt Prolonged12
  • Product Use In Unapproved Indication (a use or a product term, not a reaction)11
  • Septic Shock11
  • Decreased Appetite (named in the label)10
  • Drug Ineffective (a use or a product term, not a reaction)10
  • Infection (named in the label)10
  • Pyrexia (named in the label)10
  • Diarrhoea (named in the label)9
  • Platelet Count Decreased (named in the label)9
  • Hyponatraemia (named in the label)8
  • Mucosal Inflammation (named in the label)8
  • Nausea (named in the label)8
  • Pancytopenia8
  • Product Use Issue (a use or a product term, not a reaction)8
  • Thrombocytopenia (named in the label)8
  • Acute Kidney Injury (named in the label)7
  • Disease Progression (a use or a product term, not a reaction)7

Source: FDA Adverse Event Reporting System (FAERS) via openFDA, reports through July 30, 2026; reactions as MedDRA preferred terms

What next?

Glasdegib: the full record
label, generics, price, shortages, recalls
Side effects hub
the most reported medicines and reactions