Insulin Aspart: uses, dosing, side effects & brands
Insulin Aspart is an insulin analog sold in the U.S. under 3 brand and generic names. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.
Key facts
- Drug class
- Insulin Analog
- Available as
- Injectable
- Sold as
- 3 products — Fiasp, Fiasp Flextouch and Fiasp Penfill
- Prescription?
- Prescription only
- Generic available?
- Not in our catalog
- What the pharmacy pays
- about $7 per ml — not your price
How insulin aspart is dosed
From the FDA label for Fiasp (application BLA208751). Other insulin aspart products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.
Individualize and adjust the dosage of FIASP based on route of administration, individual’s metabolic needs, blood glucose monitoring results and glycemic control goal ( 2.3 ). • Dosage adjustments may be needed when switching from another insulin, with changes in physical activity, changes in concomitant medications, changes in meal patterns, changes in renal or hepatic function or during acute illness ( 2.3 ). • Subcutaneous injection ( 2.2 ): o Inject at the start of a meal or within 20 minutes after starting a meal into the abdomen, upper arm, or thigh. o Rotate injection sites within the same region to reduce the risk of lipodystrophy and localized cutaneous amyloidosis. o Should generally be used in regimens with an intermediate- or long-acting insulin. • Continuous Subcutaneous Infusion (Insulin Pump) ( 2.2 ): o Refer to the insulin infusion pump user manual to see if FIASP can be used. Use in accordance with the insulin pumps’ instructions for use. o Administer by continuous subcutaneous infusion using an insulin pump in a region recommended in the instructions from the pump manufacturer. Rotate infusion sites within the same region to reduce the risk of lipodystrophy and localized cutaneous amyloidosis. • Intravenous Infusion: Administer only under medical supervision after diluting to concentrations from 0.5 to 1 unit/mL insulin aspart in infusion systems using…
Insulin Aspart side effects
The following clinically significant adverse reactions are described elsewhere in labeling: • Hyperglycemia or Hypoglycemia with Changes in Insulin Regimen [see Warnings and Precautions ( 5.2 )] • Hypoglycemia [see Warnings and Precautions ( 5.3 )] • Hypokalemia [see Warnings and Precautions ( 5.5 )] • Hypersensitivity and allergic reactions [see Warnings and Precautions ( 5.6 )] Adverse reactions observed with FIASP include: hypoglycemia, allergic reactions, hypersensitivity, injection/infusion site reactions, lipodystrophy, and weight gain ( 6.1 ). To report SUSPECTED ADVERSE REACTIONS, contact Novo Nordisk Inc. at 1-800-727-6500 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trial 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 actually observed in clinical practice. The data in Table 1 reflect the exposure of 763 adult patients with type 1 diabetes mellitus to FIASP in one clinical trial with a mean exposure duration of 25 weeks [see Clinical Studies ( 14.2 )] . The mean age was 44.4 years and the mean duration of diabetes was 19.9 years. 59% were male, 93% were White, and 2% were Black or African American; and 7% were Hispanic or Latino. The mean BMI was…
Who shouldn’t take insulin aspart
FIASP is contraindicated: • During episodes of hypoglycemia [see Warnings and Precautions ( 5.3 )] . • In patients with known hypersensitivity to insulin aspart or any of the excipients in FIASP [see Warnings and Precautions ( 5.6 )] . • During episodes of hypoglycemia ( 4 ). • Hypersensitivity to insulin aspart or any of the excipients in FIASP ( 4 ).
Insulin Aspart drug interactions
Table 5 includes clinically significant drug interactions with FIASP. Table 5. Clinically Significant Drug Interactions with FIASP Drugs That May Increase the Risk of Hypoglycemia Drugs: Antidiabetic agents, ACE inhibitors, angiotensin II receptor blocking agents, disopyramide, fibrates, fluoxetine, monoamine oxidase inhibitors, pentoxifylline, pramlintide, salicylates, somatostatin analogs (e.g., octreotide), and sulfonamide antibiotics. Intervention: Dose reductions and increased frequency of glucose monitoring may be required when FIASP is co-administered with these drugs. Drugs That May Decrease the Blood Glucose Lowering Effect of FIASP Drugs: Atypical antipsychotics (e.g., olanzapine and clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, isoniazid, niacin, oral contraceptives, phenothiazines, progestogens (e.g., in oral contraceptives), protease inhibitors, somatropin, sympathomimetic agents (e.g., albuterol, epinephrine, terbutaline), and thyroid hormones. Intervention: Dose increases and increased frequency of glucose monitoring may be required when FIASP is co-administered with these drugs. Drugs That May Increase or Decrease the Blood Glucose Lowering Effect of FIASP Drugs: Alcohol, beta-blockers, clonidine, and lithium salts. Pentamidine may cause hypoglycemia, which may sometimes be followed by hyperglycemia. Intervention: Dose adjustment and increased frequency of glucose monitoring may be required when FIASP is co-administered with these drugs. Drugs That May Blunt Signs and Symptoms of Hypoglycemia Drugs: Beta-blockers, clonidine, guanethidine, and reserpine. Intervention: Increased frequency of glucose monitoring may be required when FIASP is co-administered with these drugs. • Drugs that Increase Hypoglycemia Risk or Increase or Decrease Blood Glucose Lowering Effect: Adjustment of dosage may be needed; closely monitor blood glucose ( 7 ). • Drugs that Blunt Hypoglycemia Signs and Symptoms (e.g., beta-blockers, clonidine, guanethidine, and reserpine) : Increased frequency of glucose monitoring may be required ( 7 ).
Every insulin aspart product we track (3)
Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.
| # | Drug | Rating | Type | Form | Generic? | Pharmacy pays | |
|---|---|---|---|---|---|---|---|
| 1 | 66/100 | Prescription | Injectable | Generic | $7 | View → | |
| 2 | 66/100 | Prescription | Injectable | Generic | $7 | View → | |
| 3 | 66/100 | Prescription | Injectable | Generic | $7 | View → |
Combination products containing insulin aspart
A combination is a different drug — different dosing, different warnings. It is listed here so you can find it, not so you can substitute it.
How long insulin aspart keeps
No insulin aspart label we read sets a separate limit for after opening, but they do specify how it must be stored — and the stability behind any date assumes those conditions.
Does insulin aspart expire? The in-use limits and storage rules from its labelsWhat people report to the FDA about insulin aspart
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 11,316 reports naming insulin aspart, and the FDA flagged 88% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- nausea760 reports
- dyspnoea732 reports
- hypoglycaemia713 reports
- blood glucose increased711 reports
- vomiting665 reports
- diarrhoea513 reports
- abdominal pain493 reports
- acute kidney injury451 reports
Read these as a signal, not a rate. A report does not mean insulin aspart caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.
Source: openFDA drug/event (FAERS), retrieved August 25, 2026.
Related calculators
Frequently asked questions
What is insulin aspart?
Insulin aspart is a rapid-acting insulin analog for subcutaneous or intravenous administration.
What kind of drug is insulin aspart?
The FDA classifies insulin aspart as an insulin analog. Insulin analogs are lab-modified versions of human insulin engineered to be absorbed faster or last longer. Like natural insulin, they lower blood sugar by helping muscle and fat cells take up glucose and by telling the liver to stop releasing its own sugar. If you are checking whether it is safe to combine with something else, the class is what matters — two drugs from the same class usually should not be stacked.
Can you take insulin aspart with other medicines?
It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run insulin aspart against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.
What brand names is insulin aspart sold under?
We track 3 insulin aspart-containing products in the U.S.: Fiasp, Fiasp Flextouch and Fiasp Penfill. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.
What forms does insulin aspart come in?
Across the brands we track, insulin aspart is currently marketed as injectable, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.
Is there a generic insulin aspart?
We do not currently list a generic-labelled insulin aspart product. That does not always mean none exists — it means none appears under a generic name in the FDA data we track. Ask your pharmacist.
Cite this page
- APA
- pharmaranks. (2026, July 24). Insulin Aspart: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/insulin-aspart
- MLA
- “Insulin Aspart: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/insulin-aspart.
We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.
Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.
Read the full FDA label for insulin aspart on DailyMed (NIH) ↗.