Administration Instructions:

1. Prepare the inhaler: Ensure that the Exubera inhaler is clean and in working order. Replace the cartridge of insulin as needed.
   
   
2. Place the cartridge into the inhaler: Insert the insulin cartridge into the inhaler device.
   
   
3. Inhale the powder: Take a deep breath in through the inhaler device. Ensure that you inhale deeply so that the insulin powder can enter your lungs.
   
   
4. Hold your breath: After inhalation, hold your breath for a few seconds to allow the insulin to be absorbed effectively.
   
   
5. Exhale and dispose of the cartridge: Exhale slowly and dispose of the insulin cartridge if it is used up.
   
   

Exubera should be used at mealtime as part of a broader insulin regimen that may include other forms of insulin for long-term blood sugar control.

Precautions:

• Use with caution in individuals with lung disease: Patients with lung conditions like asthma or chronic obstructive pulmonary disease (COPD) were advised to avoid Exubera due to concerns about lung function and potential side effects.
  
  

Avoid in smokers: Exubera was not recommended for individuals who smoked or had a history of smoking, as smoking could affect lung function and the absorption of insulin.

Exubera works in the same way as traditional insulin injections. It helps to regulate blood sugar by mimicking the actions of the natural insulin hormone in the body. Insulin helps glucose (sugar) enter the cells of the body, where it is used for energy or stored for future use. Without adequate insulin, glucose cannot enter the cells properly, leading to high blood sugar levels, which is a hallmark of diabetes.

What made Exubera unique was its method of delivery: inhalation. When the powdered insulin is inhaled into the lungs, it is absorbed into the bloodstream through the alveoli (air sacs in the lungs). This allows for faster absorption compared to subcutaneous insulin, which typically takes longer to enter the bloodstream.

The goal of Exubera was to provide patients with a rapid-acting insulin alternative that could be used at mealtime to control blood sugar spikes without the need for injections. However, Exubera was later withdrawn due to concerns about its safety, including the potential long-term impact of inhaling insulin on lung function.

Common Side Effects:

• Coughing: One of the most common side effects associated with Exubera was coughing, which occurred because the powdered insulin could irritate the throat and lungs.
  
  
• Sore Throat: Patients might also experience a sore throat, which could be a result of the inhaled insulin powder.
  
  
• Dry Mouth: A dry mouth was another common side effect reported by some users.
  
  

Serious Side Effects:

• Lung-related issues: The primary concern with Exubera was its potential effect on lung function. Studies suggested that long-term use of inhaled insulin could cause lung damage, particularly in people with pre-existing lung conditions.
  
  
• Hypoglycemia: As with all insulin treatments, there was a risk of hypoglycemia, especially if the patient took too much insulin or did not eat properly before or after using Exubera.
  
  
• Allergic Reactions: Although rare, some individuals may have experienced allergic reactions to insulin or the components of the inhaler device.
  
  

If any serious side effects occurred, patients were advised to contact their healthcare provider immediately.

• Lung Function Monitoring: Patients using Exubera required regular lung function tests to ensure that the inhaled insulin did not cause any long-term damage. Those with existing lung diseases, such as asthma or chronic obstructive pulmonary disease (COPD), were generally discouraged from using Exubera.
  
  
• Not Recommended for Smokers: People who smoked or had a history of smoking were advised to avoid Exubera due to concerns about the impact of smoking on lung function and the potential for reduced insulin absorption.
  
  
• Not a Substitute for Long-Acting Insulin: Exubera was used as a mealtime insulin and was not a substitute for basal insulin (long-acting insulin) required to maintain blood sugar levels throughout the day and night.
  
  

As an insulin medication, Exubera had interactions with other drugs that affected blood glucose levels. These include:

• Oral hypoglycemics: Other drugs used to control blood sugar could interact with Exubera, potentially enhancing or reducing its effectiveness. The use of these drugs required close monitoring to avoid hypoglycemia (low blood sugar).
  
  
• Beta-blockers: Medications such as beta-blockers that lower blood pressure can interfere with the body’s natural response to hypoglycemia, making it harder to recognize low blood sugar symptoms.
  
  
• Corticosteroids and diuretics: These drugs can raise blood sugar levels, requiring more insulin to maintain control.
  
  

Patients taking Exubera should inform their healthcare provider of all the medications they are taking to prevent any adverse interactions.

• Starting Dosage: The dosage of Exubera was tailored to the individual’s needs. For most patients, the starting dose was typically 2.5 mg or 5 mg of insulin per meal, with adjustments based on blood glucose levels.
  
  
• Adjustment of Dosage: The dose was adjusted by the healthcare provider based on the patient’s blood glucose levels and their response to the medication.
  
  

It is important to follow the prescribed dosage to prevent complications like hypoglycemia or hyperglycemia.

Exubera required a doctor’s prescription. Because it was an innovative treatment, doctors would assess whether it was suitable for their patients based on factors such as lung health, type of diabetes, and how well they were controlling their blood glucose levels.

Patients were encouraged to discuss their treatment options with their healthcare providers to determine the best course of action for managing their diabetes.

• What is Exubera used for?
  It was used to help control blood sugar in adults with type 1 and type 2 diabetes.

• What was the active ingredient?
  Human insulin in an inhaled powder form.

• How did Exubera work?
  Patients inhaled the powdered insulin through a special device, allowing it to be absorbed through the lungs into the bloodstream.

• When was Exubera approved?
  Approved by the FDA in 2006 as the first inhaled insulin.

• Why was Exubera withdrawn from the market?
  It was discontinued in 2007 due to low patient acceptance, high cost, bulky inhaler design, and poor sales.

• What were the advantages of Exubera?
  Provided a needle-free alternative to mealtime insulin injections.

• What were the disadvantages?

  • Large, inconvenient inhaler device

  • Expensive compared to injectable insulin

  • Dosing was less precise

  • Concerns about long-term lung safety

• Did Exubera replace long-acting insulin?
  No, it was only for mealtime (prandial) insulin needs; patients still needed a long-acting insulin for basal coverage.

• What side effects were associated with Exubera?
  Cough, throat irritation, respiratory infections, and potential reduction in lung function.

• Was Exubera safe for smokers?
  No, it was not recommended for current or recent smokers due to altered absorption in the lungs.

• Was lung testing required?
  Yes, patients needed pulmonary function tests (spirometry) before and during treatment.

• Can Exubera still be prescribed?
  No, it has been withdrawn worldwide and is no longer available.

• Are there other inhaled insulins available today?
  Yes, Afrezza (approved in 2014) is a newer inhaled insulin with a smaller, more convenient inhaler.

• Is Exubera considered safe in hindsight?
  It was generally effective, but concerns about lung health, complexity, and poor adoption led to its removal.

• Who manufactured Exubera?
  Developed by Nektar Therapeutics and marketed by Pfizer.

• Did Exubera improve blood sugar control?
  Yes, it was effective for post-meal glucose control, similar to injectable rapid-acting insulin.

• Was Exubera covered by insurance?
  Coverage was limited, and cost was a major barrier to its success.

• Is there a generic version of Exubera?
  No, it was discontinued before generics were developed.

• Could Exubera return in the future?
  No, it is unlikely. However, newer inhaled insulins like Afrezza carry on the concept in an improved form.