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What the label lists and what reports show

Isoproterenol side effects

Isoproterenol's FDA label lists its adverse reactions in its own words. FAERS holds 422 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 torsade de pointes (39 reports).

  • Generic listed

Check it at the source: the isoproterenol FDA label on DailyMed (effective December 16, 2025, Eugia US LLC); the FDA FAERS public dashboard.

What does the label list?

From the label: adverse reactions

The following adverse reactions have been associated with use of isoproterenol. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or to establish a causal relationship to drug exposure. Nervous system disorders: Nervousness, headache, dizziness, visual blurring Cardiovascular: Tachycardia, tachyarrhythmias, palpitations, angina, ventricular arrhythmias, Adams-Stokes attacks, pulmonary edema Respiratory: Dyspnea Other: Flushing of the skin, sweating, mild tremors, pallor, nausea Common adverse reactions with isoproterenol include tachycardia and palpitations ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Eugia US LLC at 1-866-850-2876 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Source: FDA drug label, Eugia US LLC, effective December 16, 2025 (SPL set 3e4050e8-7d94-4ed7-951d-1ff818ddadf1), via openFDA; the full label on DailyMed

What do FAERS reports show?

422 reports list isoproterenol among the medicines taken, each a report of something that happened, not proof the medicine caused it; 56 are coded as a death and 234 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 17 reactions below, 2 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

  • Drug Ineffective (a use or a product term, not a reaction)117
  • Torsade De Pointes39
  • Off Label Use (a use or a product term, not a reaction)38
  • Ventricular Tachycardia27
  • Electrocardiogram Qt Prolonged23
  • Cardiogenic Shock21
  • Drug Interaction (a use or a product term, not a reaction)20
  • Toxic Epidermal Necrolysis20
  • Toxicity To Various Agents20
  • Ventricular Fibrillation20
  • Cardiac Arrest19
  • Bradycardia18
  • Condition Aggravated (a use or a product term, not a reaction)18
  • Drug Ineffective For Unapproved Indication (a use or a product term, not a reaction)17
  • Hypotension17
  • Overdose (a use or a product term, not a reaction)17
  • Product Use In Unapproved Indication (a use or a product term, not a reaction)15
  • Atrial Fibrillation14
  • Acute Kidney Injury12
  • Stress Cardiomyopathy12
  • Arrhythmia (named in the label)11
  • Arrhythmic Storm11
  • Atrioventricular Block Complete11
  • Dyspnoea (named in the label)11
  • Exposure During Pregnancy (a use or a product term, not a reaction)10

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

What next?

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