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insulin isophane

First FDA approval 10/28/1982: 44 years on the US market.

This grade answers one narrow question: how strong is the public evidence and safety record behind this drug, and how clean is its money trail and court record? It is not a verdict on whether the drug is right for you.

D

Score breakdown (62/100)

Safety ×35%
C
Evidence ×25%
F
Regulatory ×15%
A
Money & lawsuits ×15%
A
Options ×10%
F

Safety: 70

Evidence: 17

Regulatory history: 92

Money & lawsuits: 100

Options: 40

FDA boxed warning

WARNING: RISK OF ACUTE BRONCHOSPASM IN PATIENTS WITH CHRONIC LUNG DISEASE Acute bronchospasm has been observed in AFREZZA-treated patients with asthma and Chronic Obstructive Pulmonary Disease (COPD) [see Warnings and Precautions ( 5.1 )]. AFREZZA is contraindicated in patients with chronic lung disease such as asthma or COPD [see Contraindications ( 4 )]. Before initiating AFREZZA, perform a detailed medical history, physical examination, and spirometry (FEV 1 ) to identify potential lung disease in all patients [see Dosage and Administration ( 2.1 ), Warnings and Precautions ( 5.1 )]. WARNING: RISK OF ACUTE BRONCHOSPASM IN PATIENTS WITH CHRONIC LUNG DISEASE See full prescribing information for complete boxed warning. Acute bronchospasm has been observed in AFREZZA-treated patients with asthma and Chronic Obstructive Pulmonary Disease (COPD). ( 5.1 ) AFREZZA is contraindicated in patients with chronic lung disease such as asthma or COPD. ( 4 ) Before initiating AFREZZA, perform a detailed medical history, physical examination, and spirometry (FEV 1 ) to identify potential lung disease in all patients. ( 2.1 ), ( 5.1 )

Independent reviews and post-approval warnings

WHO Essential Medicine

Listed on the WHO Model List of Essential Medicines: a global expert panel judged it among the medicines a health system should always have, on evidence of value, not marketing.

What the FDA label says

Approved uses

® is indicated to improve glycemic control in adult and pediatric patients 6 years of age and older with diabetes mellitus. AFREZZA ® is a rapid acting inhaled human insulin indicated to improve glycemic control in adult and pediatric patients 6 years of age and older with diabetes mellitus. ( 1 ) Limitations of Use : Not recommended for the treatment of diabetic ketoacidosis (DKA) ( 1 ) Not recommended in patients who smoke or who have recently stopped smoking ( 1 ) Limitations of Use: AFREZZA is not recommended for the treatment of diabetic ketoacidosis (DKA) [see Warnings and Precautions ( 5.6 )] . The safety and effectiveness of AFREZZA in patients who smoke have not been established. The use of AFREZZA is not recommended in patients who smoke or who have recently stopped smoking [see Warnings and Precautions ( 5.5 )].

Contraindications

is contraindicated: During episodes of hypoglycemia [see Warnings and Precautions ( 5.3 )]. In patients with chronic lung disease, such as asthma or COPD, because of the risk of acute bronchospasm [see Warnings and Precautions ( 5.1 )]. In patients with a previous severe hypersensitivity reaction to any regular human insulin product or any of the inactive ingredients in AFREZZA. Severe, life-threatening, generalized allergy, including anaphylaxis, can occur with AFREZZA [see Warnings and Precautions ( 5.7 )]. During episodes of hypoglycemia ( 4 ) Chronic lung disease, such as asthma, or COPD ( 4 ) Hypersensitivity to any regular human insulin product or any of the inactive ingredients in AFREZZA ( 4 )

Warnings and precautions

Hypoglycemia or Hyperglycemia with Changes in Insulin Regimen : Make necessary changes to a patient's insulin regimen under close medical supervision with increased frequency of blood glucose monitoring. For patients with type 2 diabetes mellitus, oral antidiabetic treatment dosage modifications may be needed. ( 5.2 ) Hypoglycemia (may be life-threatening): Increase frequency of glucose monitoring in patients at higher risk for hypoglycemia and those who have reduced symptomatic awareness of hypoglycemia. ( 5.3 ) Decline in Pulmonary Function : Assess pulmonary function (e.g., spirometry (FEV 1 )) at baseline, after 6 months of therapy, and annually, even in the absence of pulmonary symptoms. In patients who have a decline of ≥ 20% in FEV 1 from baseline, consider discontinuing AFREZZA. Consider more frequent monitoring of pulmonary function in patients with pulmonary symptoms ( 5.4 ) Lung Cancer : In patients with active lung cancer, a prior history of lung cancer, or in patients at risk for lung cancer, consider whether the benefits of AFREZZA use outweigh this potential risk. ( 5.5 ) Diabetic Ketoacidosis : In patients at risk for DKA, increase the frequency of glucose monitorin...

Adverse reactions (label)

The following serious adverse reactions are described below and elsewhere in the labeling: Acute bronchospasm in patients with chronic lung disease [see Warnings and Precautions ( 5.1 )] Hypoglycemia [see Warnings and Precautions ( 5.3 )] Decline in pulmonary function [see Warnings and Precautions ( 5.4 )] Lung cancer [see Warnings and Precautions ( 5.5 )] Diabetic ketoacidosis [see Warnings and Precautions ( 5.6 )] Hypersensitivity reactions [see Warnings and Precautions ( 5.7 )] The most common adverse reactions associated with AFREZZA (2% or greater incidence) are hypoglycemia, cough, and throat pain or irritation ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact MannKind at 1-877-323-8505 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. Adverse Reactions in Clinical Trials in Adults with Type 1 or Type 2 Diabetes Mellitus The data described below reflect exposure of 3,017 adult patien...

Recent major label changes

Indications and Usage ( 1 ) 5/2026 Dosage and Administration Important Administration Information ( 2.2 ) 5/2026 Recommended Starting Mealtime Dosage of AFREZZA ( 2.3 ) 1/2026

Source: FDA SPL label for AFREZZA (Mannkind Corporation), effective 20260530. Full label on DailyMed.

Side-effect reports sent to the FDA

These are counts of reports people filed, not rates of harm. Anyone can file one, and nobody checks whether the drug was the cause. Millions of doses are taken for every report sent, so the useful part is how this drug compares with the average across all drugs.

47,823reports that mention this drug
47,767of those blame this drug, not another one the person was taking
59%of reports describe a serious outcome, such as a hospital stay (average for all drugs: 57%)
7.4%of reports include a death, from any cause (average for all drugs: 9.1%)

Problems reported most often

Blood Glucose Increased · 9,995Drug Ineffective · 3,235Blood Glucose Decreased · 2,963Incorrect Dose Administered · 2,213Hypoglycaemia · 1,734Visual Impairment · 1,650Diarrhoea · 1,533Nausea · 1,530Dyspnoea · 1,474Wrong Technique In Product Usage Process · 1,391Fall · 1,367Malaise · 1,365Fatigue · 1,343Headache · 1,263Acute Kidney Injury · 1,239

Reports per year

20192020202120222023202420252026
4,5554,1973,6593,0212,5452,4822,3981,033

Source: the FDA's Adverse Event Reporting System (FAERS). Reports are voluntary and unverified. Drugs that are prescribed a lot, in the news, or in lawsuits attract more reports, so the percentages are compared with the whole database to correct for that partly, not fully.

Recalls and regulatory record

1recall actions on file
0 / 0brand / generic applications
0label changes since 2021
NoREMS program
DateClassFirmReason
08/2026Class IIBaxter Healthcare CorporationCGMP Deviations

Class I = reasonable probability of serious harm. Class II = temporary or reversible harm. Class III = unlikely to harm. Most generic recalls are manufacturing or labeling defects for one lot, not a verdict on the molecule.

Evidence base

5randomized trials (PubMed)
3systematic reviews
185registered trials
31%of completed trials posted results
9%terminated or withdrawn
62%industry-funded

Independent Cochrane reviews

Counts measure how much evidence exists and how transparent it is, not how big the benefit is. For that, ask your prescriber: if 100 people like me took this, how many would get better because of it, and how many would be harmed? (Doctors call these the "number needed to treat" and "number needed to harm.") It differs by condition and is the number drug ads leave out. Sources: PubMed, ClinicalTrials.gov.

Money and lawsuits

In 2024, drug companies reported $0 in payments to US physicians and hospitals tied to this drug across 0 transactions.

No pending federal MDL names this drug or its brands.

Not named in any federal pharmaceutical settlement of $100M or more on record.

Sources: CMS Open Payments (Sunshine Act); Judicial Panel on Multidistrict Litigation pending docket list; DOJ settlements as tabulated on Wikipedia with links to the primary record. State-court and individual suits are not included.

Who takes it and what it costs

Not in the Medicare Part D spending file (typically hospital-administered or very new drugs).

Same-class alternatives

No same-class alternatives found in RxClass.

Questions to ask your prescriber

  1. This drug carries a boxed warning. Which specific risk does it cover, and does it apply to me?
  2. The most-reported problems in FDA's adverse event data are blood glucose increased, blood glucose decreased, incorrect dose administered. How would we recognize and handle those?
  3. There is no generic. Is there an older generic in the same class that works as well for my situation?
  4. What result are we expecting, by when, and what is the plan if it does not happen?
  5. If 100 people like me took this drug, how many would actually get better because of it, and how many would be harmed by it? (Doctors call these the number needed to treat and the number needed to harm.)