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Insulin aspart 

Fiasp Insulin

Fiasp is an FDA-approved rapid-acting insulin that is used for improving glycemic control in patients with type 1 and type 2 diabetes mellitus. It contains insulin aspart as its active ingredient. It also includes vitamin B3 (niacinamide), which speeds up the absorption to keep insulin levels stable. Fiasp is available in various forms, including the Fiasp Cartridge, Fiasp Flextouch pen, and Fiasp Insulin vial that have a strength of 100 units/ml. The dosage depends upon the patient’s age, gender, condition, and response to treatment. Follow your doctor’s directions for safe and efficient use of the medication. 

Product Overview

Fiasp Insulin is a rapid-acting insulin used to improve glycemic control in patients with type 1 and type 2 diabetes mellitus. It contains insulin aspart and vitamin B3 (niacinamide) to speed up absorption and stabilize insulin levels. Available as a cartridge, Flextouch pen, or vial (100 units/ml), dosage depends on age, gender, condition, and response to treatment. Follow your doctor’s instructions for safe use. 

For type 1 diabetes, the total insulin dose depends on body weight, with both fast-acting and long-acting insulin used. For type 2 diabetes, the total insulin dose also depends on body weight, with a combination of fast-acting and long-acting insulin. Your doctor will determine the correct dosage based on guidelines and your condition. Administer Fiasp subcutaneously at the start of a meal or within 20 minutes after starting. It starts working within 2.5 minutes and should be used in combination with long-acting insulin when injected under the skin. Rotate injection sites to avoid skin issues. 

Side effects may include headache, nausea, and injection site reactions. Severe side effects include hypoglycemia and allergic reactions. Tell your doctor about all medications you’re taking, as some may interact with Fiasp. Store unopened Fiasp in the refrigerator and open Fiasp at room temperature, away from light and moisture. Do not share Fiasp pens, and avoid alcohol consumption. If you miss a dose, check your blood sugar level and inject if necessary. If you suspect an overdose, seek medical help immediately. Follow proper disposal guidelines for unused insulin.

Uses of Fiasp Insulin

  • It improves glycemic control in adults and children with type 1 and type 2 diabetes mellitus. 

How to Use Fiasp Insulin?


Fiasp has a strength of 100 units/ml and comes in the form of a solution in three different delivery options: 

  • Vial containing 10 ml
  • FlexTouch pen containing 3 ml
  • PenFill cartridge containing 3 ml

Recommended Dosage for Different Patients

Recommended Dosage For Patients With Type 1 Diabetes 

Your total insulin dosage will depend on your body weight (in kg). Usually, people take 0.4 to 1 unit of insulin per kg of body weight daily. Your daily insulin dosage will consist of two types of insulin: fast-acting and long-acting. Your doctor will help you decide how much of your daily dose will come from Fiasp and how much will come from a long-acting insulin.

Recommended Dosage For Patients With Type 2 Diabetes

Your total insulin dosage will depend on your body weight (in kg). Usually, people take 0.3 to 0.5 units of insulin per kg of body weight daily. Your daily insulin dosage will consist of two types of insulin: fast-acting and long-acting. Your doctor will help you decide how much of your daily dose will come from Fiasp and how much will come from a long-acting insulin.

[Note: Remember, these recommendations may vary from person to person. Discuss it with your doctor, and they’ll customize your dosage accordingly.]

How to Take It?

  • Carefully read the directions for use that come along with your prescription, and use the Fiasp Insulin as directed by your doctor. 
  • Before you start your treatment with Fiasp, your doctor or healthcare provider will show you how to administer the medication properly. You should follow the instructions provided by your healthcare provider for safe and effective use of the insulin. 
  • The dosage of Fiasp depends upon the patient’s condition, age, and needs. 
  • You should take Fiasp when you start the meal or within 20 minutes of starting it, as Fiasp is a rapid-acting insulin that starts to work within 2.5 minutes of administration. 
  • Do not start, stop, or change your dosage without consulting your doctor. Do not change your insulin type unless your doctor/ healthcare tells you to. 
  • Fiasp should be injected intravenously only by a doctor or nurse. 
  • When used subcutaneously, the best sites to inject the medication are the abdomen, front thighs, buttocks, and upper arm. For quick effect, you can inject insulin into the stomach area. 
  • You should not use the same spot for injecting Fiasp. Constantly rotate the injection spot every time you inject the insulin to avoid getting lumps, rashes, and thickened skin at the injection spot. 
  • Do not inject the medication where the skin is tender, thickened, scaly, hard, red, or has pits, stretch marks, or damaged skin. 
  • When injected just under the skin, Fiasp should be used in combination with medium or long-acting insulin that is given at least once daily. 
  • It is crucial to monitor your blood sugar levels on a regular basis to watch out for signs and symptoms of hypoglycemia and share the report with your doctor to help them determine your dosage adjustments. 
  • You may ask your healthcare provider what the standard range of blood sugar levels is and how you should check them. 

[Note: Your doctor will decide the right amount for you based on your condition, following guidelines and studies on the drug. They’ll adjust it as needed over time.]

How Does Fiasp Insulin Work?

Fiasp Insulin is a rapid-acting insulin that works by mimicking the natural insulin produced by the body. It contains insulin aspart, L-arginine, and niacinamide, which increase the absorption rate. When you take insulin at the start of your meal or within 20 minutes of eating, it is swiftly absorbed by the bloodstream within 2.5 minutes after injecting and reduces blood sugar levels. It facilitates glucose uptake by cells, muscles, and cells and suppresses the production of glucose by the liver. 

Important Safety Information

Side Effects

Common side effects of Fiasp Insulin may include:

  • Headache 
  • Common cold
  • Diarrhea
  • Nausea 
  • Vomiting 
  • Increased appetite 
  • Flu-like symptoms 
  • Respiratory tract infection
  • Urinary tract infection
  • Injection site reactions
  • Weight gain
  • Lipodystrophy  
  • Fever 

Adverse side effects of Fiasp Insulin may include:

  • Severe hypoglycemia 
  • Severe allergic reaction 
  • Severe hypokalemia 

[Note: Remember, this list may not cover all possible side effects. Always consult with your healthcare giver for medical advice about side effects.]


  • Do not share the Fiasp FlexTouch insulin pen with others even if the needle is changed, as it may spread infection from one person to another. 
  • Patients with hepatic and renal impairment may be at an increased risk of low blood sugar and may require frequent Fiasp dose adjustment and blood glucose monitoring.
  • Fiasp may decrease your blood potassium levels so that you may need dosage adjustments and regular monitoring of your potassium levels. 
  • Avoid consuming alcohol and the use of other medications that may have alcohol. 
  • Fiasp may cause extremely low blood sugar levels, so it is necessary to monitor your blood sugar regularly, especially during physical activity, changes in diet, or taking medications that may affect your blood sugar levels.


  • Refrain from driving, operating heavy machinery, and other such activities that require your attention until you understand how the medication affects you. 
  • Before taking the medication, tell your doctor if you think you are pregnant, planning to get pregnant, or breastfeeding a baby. 
  • Before taking Fiasp, let your doctor know if you are taking or planning to take any new prescription medicine or over-the-counter medicines, including herbal supplements.
  • Fiasp should be used with caution in patients who have problems related to the liver, heart, or kidney. 

Fiasp Insulin Contraindications

  • Who have a known hypersensitivity to Fiasp, insulin aspart or any inactive ingredient present in the medication. 
  • During episodes of hypoglycemia 

Missed Dose

  • If you miss a dose of Fiasp Insulin, you are required to check your blood sugar levels immediately. 
  • If it has become too high, you need to inject the prescribed dosage, but if the blood sugar level is satisfactory, you may skip the missed dose and continue as per your regular dosage schedule. 
  • Do not take two doses of Fiasp together to compensate for the missed dose. 
  • If you are still uncertain about when to take your medication, contact your doctor or healthcare provider, and they will help you. 
  • To further avoid missing your dose of insulin aspart, you can set a reminder on your phone. 

[Note: If you have missed a dose of your medication and are unsure about when to take the next one, immediately consult your doctor or pharmacist.]


You should not take insulin aspart more than the recommended dose as it can lead to severe and life-threatening side effects. Overdose of Fiasp may cause hypokalemia or hypoglycemia. Get medical help immediately if you think you have consumed more than required. You can call 911 or head to the nearest emergency room. 

[Note: If you consumed more than the recommended dose, get medical help right away or call the Poison Help line at 1-800-222-1222.]


  • You can store unopened Fiasp Insulin in the original container and keep it inside the refrigerator. But do not freeze. If it is frozen, do not use it, as using frozen insulin can be painful. Safely dispose of it in a sharps container and get a new one from your pharmacist. 
  • You may store opened Fiasp Insulin at average room temperature in a dark and dry place away from direct sunlight, heat, or moisture. 
  • Keep insulins, including Fiasp, away from the sight and reach of children. Do not keep it in the bathroom. 
  • Do not use medications that are outdated or are no longer needed. Contact your pharmacist or local waste disposal company to know how to discard the insulin safely.

[Note: Discuss with your healthcare professional about the proper disposal of any unused medicine and any questions you may have regarding its storage.]

Fiasp Insulin Interactions

  • ACE inhibitors 
  • Albuterol
  • Angiotensin II receptor blockers
  • Antidiabetics like Fluoxetine
  • Atypical antipsychotics
  • Aspirin
  • Beta-blockers
  • Birth control pills
  • Clonidine
  • Corticosteroids
  • Danazol
  • Disopyramide
  • Diuretics
  • Estrogens
  • Fibrates
  • Fluoxetine
  • Glucagon
  • Isoniazid
  • Lithium 
  • Monoamine oxidase inhibitors
  • Octreotide
  • Other diabetes medications
  • Pentamidine
  • Pentoxifylline
  • Phenothiazines
  • Protease inhibitors
  • Sulfonamide antibiotics
  • Thyroid hormone
  • Vitamin B3 

[Note: This isn’t a complete list, and there could be other drugs that interact with Fiasp Insulin. Make sure to tell your doctor about any prescription, over-the-counter medicines, and herbal products you’re taking.]

Fiasp Insulin Alternatives

[Note: Your doctor will choose what’s best for you. Don’t use any of these alternative medications without consulting your healthcare provider. Taking them by yourself may cause serious side effects.] 

Frequently Asked Questions

How should I take Fiasp Insulin? 

Take Fiasp Insulin as directed by your healthcare provider. Administer it subcutaneously (under the skin) at the beginning of a meal or within 20 minutes after starting. Ensure the insulin is clear and free from particles before each injection. Rotate injection sites to prevent skin issues. Do not inject in bruised, tender, or damaged areas. Always follow your provider’s instructions for precise dosing.

What is the onset and duration of Fiasp Insulin?

Fiasp Insulin has a rapid onset of action, typically entering the bloodstream approximately 2.5 minutes after administration. Its activity duration is shorter than regular insulin, making it particularly effective in controlling blood sugar levels after meals. However, specific onset and duration may vary among individuals. Always follow your healthcare provider’s guidance for precise dosing and timing.

How should I store Fiasp Insulin?

Unopened vials, cartridges, and pens of Fiasp Insulin should be kept in a refrigerator (36°F – 46°F). Do not freeze. Once in use, they can be kept at 59°F – 86°F for up to 28 days. Protect from light and heat. Do not use it if it appears discolored or contains particles. Always check the manufacturer’s instructions for specific storage details.

Can I travel with Fiasp Insulin?

Yes, you can travel with Fiasp Insulin. Ensure you have enough supplies for the duration of your trip and extra supplies in case of unexpected delays. Store it properly, following the manufacturer’s guidelines. If you’re flying, keep it in your carry-on bag. It’s advisable to carry a prescription or a doctor’s note explaining your need for insulin in case it’s requested during security checks.

Our Guarantee

At, we assure you the most affordable price to buy Fiasp Insulin from Canada. Rest easy knowing that your order will be dispatched from a reputable Licensed Canada Pharmacy Online, adhering to the highest standards of quality and authenticity. Our discounted medications are shipped directly from Canada to your doorstep, ensuring a swift and secure delivery experience. To conveniently access Fiasp Insulin at a substantial cost, call us at 1-888-779-2193 toll-free.


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(Shipping times may vary based on time of year)

Shipping prices:
Refrigerated items $29.99
Non-refrigerated items $19.99

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