Skip to main content
Fiasp Coupon - Fiasp 3ml of 100 units/ml flextouch pen

Fiasp

insulin aspart
Used for Diabetes Type 1, Diabetes Type 2

Fiasp (Insulin aspart) is a fast-acting insulin. It helps control blood sugar levels in adults and children with type 1 diabetes (T1D) or type 2 diabetes (T2). It's similar to insulin apart (Novolog), but it works more quickly because it contains niacinamide and L-arginine, which help with absorption. Fiasp comes as a vial, Fiasp Flextouch pen, Fiasp PenFill cartridge, and Fiasp PumpCart cartridge. This medication is given as an injection under the skin or through a continuous insulin pump. Some common side effects include upper respiratory tract infections and the common cold.

Reviewed by:Last reviewed on June 23, 2024
basics-icon

What is Fiasp (Insulin aspart)?

What is Fiasp (Insulin aspart) used for?

How Fiasp (Insulin aspart) works

Fiasp (Insulin aspart) is an insulin. Insulin is a natural hormone your body makes to control blood sugar levels. It helps your body absorb and store sugar from the bloodstream after a meal. Insulin also stops your liver from making glucose (sugar). But people with diabetes can't make insulin, don't make enough insulin, or their body doesn't respond to insulin as it should.

Fiasp (Insulin aspart) is a fast-acting insulin. It's injected with or shortly after a meal to prevent blood sugar levels from rising too high. It can also be used with the appropriate insulin infusion pump.

Drug facts

Common BrandsFiasp, Fiasp FlexTouch, Fiasp PenFill
Drug ClassInsulin
Controlled Substance ClassificationNot a controlled medication
Generic StatusNo lower-cost generic available
AvailabilityPrescription only
side-effects-icon

Side effects of Fiasp (Insulin aspart)

The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.

Common Side Effects

Adults:

  • Common cold (20-24%)
  • Respiratory tract infection (7-9%)
  • Urinary tract infection (6%)
  • Nausea (5%)
  • Back pain (4-5%)
  • Diarrhea (3-5%)

Children:

  • Respiratory tract infections (8-23%)
  • Flu (6-8%)
  • Runny nose (4-6%)
  • Headache (6-10%)
  • Fever (6-8%)
  • Vomiting (3-8%)

Less Common Side Effects

  • Low blood sugar (hypoglycemia)
  • Injection site reactions (e.g, redness, warmth, irritation)
  • Buildup of body fat (lipodystrophy)
  • Weight gain

Fiasp (Insulin aspart) serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Severely low blood sugar: dizziness, shakiness, feeling confused, feeling irritable or anxious, feeling faint, sweating, extreme hunger, not able to think clearly
  • Ketoacidosis (high ketone levels in the blood): nausea, vomiting, stomach pain, tiredness, thirsty, dry mouth, fruity breath, trouble breathing
  • Dangerously low potassium levels: weakness, muscle cramps or twitches, constipation, abnormal heartbeat, tiredness, trouble breathing
  • Severe allergic reactions: rash; hives; swelling of face, tongue, and throat; trouble breathing

Source: DailyMed

The following Fiasp (Insulin aspart) side effects have also been reported

Side effects that you should report to your care team as soon as possible:

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

prices-container

Get your GoodRx coupon

Avg retail price
$594.92(Save 75.87%)
GoodRx discount
$143.55
See prices
pros-and-cons-icon

Pros and cons of Fiasp (Insulin aspart)

Pros

  • Starts to work within 20 minutes to control your blood sugar levels after meals
  • Can be used in people with liver or kidney problems, unlike other oral diabetic medications
  • Available as a vial, pen, and cartridges for insulin pumps
  • An option for children

Cons

  • Given as an injection
  • Higher risk of low blood sugar compared to diabetes medications that are taken by mouth
  • Needs to be given multiple times per day
  • Must be used with every meal
pharmacist-tips-icon

Pharmacist tips for Fiasp (Insulin aspart)

pharmacist
  • Ask your prescriber about when you should check your blood sugar during the day as you use Fiasp (Insulin aspart). Make sure to keep a log of your blood sugar readings and show it to your provider at your office visits. This helps you and your provider keep track of how well you're responding to Fiasp (Insulin aspart) and whether you need dose adjustments.
  • It's important that you and your loved ones know how to recognize and treat low blood sugar. Common symptoms include shakiness, anxiety, and hunger. Always keep fast-acting sugar, such as glucose tablets, with you at all times so you can take it if your blood sugar level drops too low. Follow the "15-15 rule" to treat low blood sugar levels (below 70 mg/dL).

Tips on how to use Fiasp vials, Fiasp FlexTouch pens, and Fiasp PenFill cartridges:

  • Make sure you know how to use Fiasp (Insulin aspart) properly and safely to avoid accidentally hurting yourself or wasting the medication. Carefully review the instructions for use for the vial, Fiasp FlexTouch pen, or Fiasp PenFill cartridge, and contact your prescriber or pharmacist for specific directions and for any questions you have.
  • Store unopened vials, pens, and PenFill cartridges in the refrigerator until the expiration date or at room temperature for up to 28 days. Opened vials or pens that are in use can be stored in the refrigerator or at room temperature for up to 28 days. Opened PenFill cartridges that you are currently using should be kept at room temperature for a maximum of 28 days. Don't put these in the refrigerator after opening.
  • For Fiasp FlexTouch Pens: Prime the pen each time before you dial your dose and inject. This makes sure there aren't any air bubbles in your dose. Turn the dose selector to 2 units, hold the pen with the needle pointing up, gently tap it so any air bubbles go to the top, and push the dose button until the dose counter says "0." Repeat if you don't see any insulin at the needle tip.
  • Inject Fiasp (Insulin aspart) under the skin with the first bite of a meal, or within 20 minutes after starting a meal, under the skin of your stomach area, buttocks, upper legs, or upper arms. Don't use Fiasp (Insulin aspart) on an empty stomach, because this can raise your risk for severely low blood sugar. Rotate injection sites to prevent hard lumps from forming.
  • Don't shake or roll the vials. This can make bubbles or foam in the solution, which can cause you to draw up the wrong dose.
  • Always use a new needle for each injection to help prevent infections and blocked needles. Don't reuse or share your needles with other people.
  • After injecting Fiasp (Insulin aspart), throw the needle or syringe away in a sharps container or something made of heavy-duty plastic (e.g., empty milk carton, laundry detergent bottle). This helps lower the risk of needle-stick injuries. Don't throw away needles or syringes in your trash can.

Tips on how to use Fiasp PumpCart cartridges and vials through an insulin pump:

  • Refer to the instructions for the Fiasp PumpCart cartridge for use through an insulin pump. Ask your prescriber or pharmacist if you have any questions.
  • Store unopened PumpCart cartridges in the refrigerator until the expiration date or at room temperature for up to 18 days. Opened PumpCart cartridges should be kept at room temperature for a maximum of 4 days. Don't put opened cartridges back in the refrigerator.
faq-icon

Common questions about Fiasp (Insulin aspart)

Yes, Fiasp (Insulin aspart) is considered a fast-acting (or rapid-acting) insulin that's given with the first bite of a meal or within 20 minutes after starting a meal. The purpose of fast-acting insulin is to prevent your blood sugar levels from rising too high from your food.

Fiasp contains insulin aspart, which is a rapid-acting insulin. Studies show that it takes about 16-20 minutes for Fiasp (Insulin aspart) to start lowering blood sugar levels. Typically, people experience the maximum effect of this medication after about 1.5-2 hours.

The blood sugar-lowering effects of Fiasp (Insulin aspart) can last for about 5 to 7 hours after a dose. If you're taking Fiasp (Insulin aspart) as meal time insulin, you typically need to take the medication multiple times per day with each meal.

Fiasp (Insulin aspart) and Novolog (insulin aspart) are fast-acting insulins that contain insulin aspart as the active ingredient. But, they're not the same. The main difference between them is that Fiasp also contains niacinamide (vitamin B3) and L-arginine as inactive ingredients, while Novolog doesn't. The niacinamide and L-arginine in Fiasp allows your body to absorb this medication about 5 minutes faster than it does Novolog. Because Fiasp works more quickly than Novolog, you can inject it at the start of meal time or within 20 minutes of the start of your meal, instead of needing to do so 5 to 10 minutes before meals like with Novolog. Ask your diabetes care team if you have more questions about the differences between each medication.

Yes, it's possible to gain weight from Fiasp (Insulin aspart). This is a typical side effect of insulin because of how it works in your body. In clinical studies, people who took Fiasp (Insulin aspart) gained about 1.5 to 6 pounds. To lower your risk for weight gain, your healthcare team can help you plan a nutritious diet and an exercise routine that works best for you. Talk with your healthcare team if you've more questions about the risk of weight gain from Fiasp (Insulin aspart).

Yes, you can use the Fiasp (Insulin aspart) PumpCart cartridges or vial with a compatible insulin pump. It's important to check the insulin pump to make sure Fiasp (Insulin aspart) has specifically been tested for safety and compatibility with the pump. Your endocrinologist will decide if administration through an insulin pump is right for you.

Fiasp can be used with the Omnipod DASH, but not yet with the Omnipod 5. Talk with your diabetes care team if you've more questions about Fiasp (Insulin aspart) and Omnipod compatibility.

No, Fiasp (Insulin aspart) can't be used with a tandem pump because it hasn't been studied.

Fiasp (Insulin aspart) is made by Novo Nordisk.

educational-icon

How to save using GoodRx

Compare Prices
1. Compare PricesSpecify your dosage and quantity to find out exactly how much you can save.
Select your free coupon
2. Select your free couponYou can use the displayed coupon, or compare prices at other pharmacies near you.
Show coupon to your pharmacist
3. Show coupon to your pharmacistPresent your printed or electronic coupon when you pick up your prescription.
Get free couponLearn more
warnings-icon

Risks and warnings for Fiasp (Insulin aspart)

Fiasp (Insulin aspart) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.

Spread of infections from sharing injection supplies

Never share Fiasp (Insulin aspart) pens, syringes, needles, or cartridges with anyone else. Sharing Fiasp (Insulin aspart) and injection supplies with someone can raise the risk of spreading very dangerous infections to other people (including yourself).

Risk of high and low blood sugar levels

  • Risk factors: Changes in diet and exercise | Switching to Fiasp (Insulin aspart) from a different type of insulin | Drinking alcohol | Taking other medications for diabetes together with Fiasp (Insulin aspart) | Liver or kidney problems

Changing your insulin or insulin routine, such as where you inject Fiasp (Insulin aspart) or switching to a different brand of insulin aspart, can affect how your body responds to insulin. This can lead to either high or low blood sugar levels. In addition, injecting Fiasp (Insulin aspart) repeatedly into skin areas that show signs of lipodystrophy, such as pitting or thickened skin, can also result in high blood sugar levels.

Don't make changes to your Fiasp (Insulin aspart) dose or routine without first checking in with your diabetes care team. Make sure to avoid injecting into skin areas that show signs of lipodystrophy. If your care team instructs you to make any changes to your insulin routine, they'll also ask you to check your blood sugar levels more often to see how the changes affect your blood sugar levels.

Dangerously low blood sugar levels (hypoglycemia)

  • Risk factors: Changes in diet and exercise | Drinking alcohol | Taking other medications for diabetes together with Fiasp (Insulin aspart) | Liver or kidney problems | Not using Fiasp (Insulin aspart) as directed

Using Fiasp (Insulin aspart) alone or together with other medications that lower blood sugar can lead to hypoglycemia, which is dangerously low blood sugar levels. If not treated in time, it can be life-threatening.

Check your blood sugar level regularly to make sure it's within a safe range. If your diabetes care team instructs you to mix different insulins together, read the label of the insulins carefully to make sure you're using the right products. If you make any changes to your diet or meal patterns, other medications, or how much you exercise, let your care team know because they might need to adjust your dose of Fiasp (Insulin aspart).

Make sure you're familiar with symptoms of hypoglycemia, such as feeling shaky, being nervous or anxious, sweating or body chills, and excessive hunger. Keep fast-acting sugars, such as glucose tablets, with you at all times so you can treat an episode of hypoglycemia. If your blood sugar levels don't improve even after you take fast-acting sugars, get medical help right away.

Low blood potassium levels

  • Risk factors: Taking other medications that lower potassium levels

Fiasp (Insulin aspart) can lower the levels of potassium in your blood, which can sometimes be dangerous. You're at risk if you're already taking medications that lower your potassium, like certain diuretics (water pills). Your prescriber will check your potassium levels regularly and might give you medications to keep your potassium in the normal range. Tell your prescriber if you have symptoms of low potassium, such as weakness, muscle cramps or twitches, nausea, vomiting, or abnormal heartbeats.

Swelling from fluid buildup and risk of heart failure when taken with certain blood sugar medications

  • Risk factors: Taking glitazones together with insulin | History of heart failure

Taking insulin, including Fiasp (Insulin aspart), with medications called glitazones (also known as thiazolidinediones), like pioglitazone (Actos), can cause your body to hold onto fluid. This can worsen or lead to heart failure. Let your prescriber know if you've noticed sudden weight gain or if you have symptoms of heart failure, such as trouble breathing, tiredness, or headache. They might need to make changes to your blood sugar medications.

Dangerously high blood sugar levels or buildup of ketones (for people who use insulin pump)

  • Risk factors: Insulin pump not working properly

If you're using an insulin pump to inject Fiasp (Insulin aspart), check that your pump is working properly and that you know how to use it correctly. When the pump isn't work properly, you're at risk of having extremely high blood sugar levels or a serious complication of diabetes called ketoacidosis. Call your prescriber right away if you can't fix your pump quickly. Your prescriber might recommend that you inject Fiasp (Insulin aspart) in other ways in the meantime. Seek medical help if you have symptoms of ketoacidosis, such as tiredness, fruity-smelling breath, or vomiting.

dosage-icon

Fiasp (Insulin aspart) dosage

The average cost for 5 flextouch pens of 3ml of 100 units/ml of Fiasp (Insulin aspart) is $143.55 with a free GoodRx coupon. This is 75.87% off the average retail price of $594.92.
cartonCarton
DosageQuantityPrice as low asPrice per unit
5 PenFill cartridges of 3ml4 cartons$522.22$130.56
flextouch penFlextouch pen
DosageQuantityPrice as low asPrice per unit
3ml of 100 units/ml5 flextouch pens$143.55$28.71
vialVial
DosageQuantityPrice as low asPrice per unit
10ml of 100 units/ml3 vials$217.58$72.53

Typical dosage for Fiasp (Insulin aspart)

Your diabetes care team will determine your dose of Fiasp (Insulin aspart) based on different factors, such as your blood sugar level, body weight, how responsive your body is to insulin.

  • For injections under the skin: Inject Fiasp (Insulin aspart) under the skin in the stomach, thigh, or upper arm, with the first bite of a meal or within 20 minutes after starting a meal.
  • For continuous insulin pumps: Use the insulin pump according to your prescriber's instructions. Follow the directions from your insulin pump manufacturer to set up and use the pump.
  • For injections through the vein: Fiasp (Insulin aspart) can be given as an injection into the vein by a healthcare professional (HCP), typically in a hospital setting. The dose depends on the type of diabetes you have and your weight.
cost-icon

How much does Fiasp (Insulin aspart) cost?

To access savings, use a GoodRx coupon and pay just a fraction of the retail price.
contraindications-icon

Fiasp (Insulin aspart) contraindications

Contraindications are specific health conditions or situations in which a person should not take a medication due to safety concerns. If you have any of the following conditions or if any of the following apply to you, let your healthcare provider know because Fiasp (Insulin aspart) will not be safe for you to take.

  • Symptoms of low blood sugar (hypoglycemia)
alternatives-icon

What are alternatives to Fiasp (Insulin aspart)?

There are a number of medications that your doctor can prescribe in place of Fiasp (Insulin aspart). Compare a few possible alternatives below.
Fiasp (Insulin aspart)
Used for:
$143.55Lowest GoodRx priceView prices
Used for:
$24.88Lowest GoodRx priceView prices
Used for:
$27.81Lowest GoodRx priceView prices
images-icon

Fiasp (Insulin aspart) images

This medicine is Colorless Flextouch Pen.

Get savings updates for Fiasp (Insulin aspart)

Receive price alerts, news, and other messages from GoodRx about Fiasp (Insulin aspart) and other healthcare topics and relevant savings offers.

By providing your email, you consent to receive marketing communications from GoodRx, which may include content and/or data related to men's health, women's health, reproductive care, or sexual health. You agree to the GoodRx Terms of Use and acknowledge the Privacy Policy. You can unsubscribe at any time.

References

Best studies we found

GoodRx Health has strict sourcing policies and relies on primary sources such as medical organizations, governmental agencies, academic institutions, and peer-reviewed scientific journals. Learn more about how we ensure our content is accurate, thorough, and unbiased by reading our editorial guidelines.

Was this page helpful?