Is an Insulin Pen Right for You? Pros, Cons, and Key Facts

Whether you’re newly diagnosed or considering switching from syringes or a pump, using an insulin pen has become one of the most popular insulin delivery systems available today.

If you have diabetes and are on insulin, how you administer your insulin can make a big difference in your level of comfort, perceived convenience, and diabetes control. In this post, we’ll explore how insulin pens work, review different insulin pen brands, share tips for new users, and compare pens with other insulin delivery methods like syringes, patches, and insulin pumps. 

If you’re interested in other delivery options, check out our guides on insulin pumps and insulin patches. 

***This article is not intended to provide medical advice, diagnosis, opinion, treatment or services. This article and the links contained in it provide general information for educational purposes only. The information provided in this article is not a substitute for medical care, and should not be used in place of the advice of your physician or registered dietitian.

Insulin Pens: A Popular and Convenient Option

Insulin pens are prefilled or refillable devices that make insulin injections easier and more discreet. Instead of drawing up insulin from a vial with a syringe, you simply attach a needle, dial your dose, and inject.

Pens are available for both short-acting and long-acting insulins, and can be disposable or reusable with replaceable cartridges. With fewer steps than traditional injections and a more modern, user-friendly design, it’s easy to see why people tend to prefer pens over syringes and vials.

How to Use an Insulin Pen

Using an insulin pen is fairly simple:

1. As with any injection, wash your hands first.
2. Attach a new insulin pen needle to your pen.
3. Prime the pen (usually 1-2 units to remove air).
4. Dial your dose.
5. Inject into a recommended site (abdomen, thigh, upper arm).
6. Hold the pen in place for 5–10 seconds.
7. Safely dispose of the needle.

Even though the process is simple, proper technique matters.

Types of Insulin Pens: Disposable vs. Reusable

There are two main types of pens:

• Disposable Insulin Pens: Pre-filled and thrown away after the insulin runs out.
• Reusable Insulin Pens: Used with replaceable cartridges. The device itself lasts longer and often connects to an app on a smartphone to provide additional data.

Some users prefer the convenience of disposable pens, while others like the lower waste and increased access to data that reusable pens offer.

Insulin Pen Brands to Know

There are several major insulin pen brands, each offering different types of insulin. Your doctor will prescribe the best pens for you based on your unique needs. Here are some common ones:

• Lantus Insulin Pen: Delivers long-acting insulin glargine. Ideal for once-daily use.
• Humalog Insulin Pen: Rapid-acting insulin lispro used before meals.
• Novolog Insulin Pen: Another rapid-acting option, containing insulin aspart.
• Insulin Lispro Pen: A generic version of Humalog; often more affordable.
• Insulin Spritzen Pen: Common in European markets; similar to other rapid-acting pens.

Each pen may have slightly different instructions, so always read the manual or ask your pharmacist for guidance.

Do Insulin Pens Need to Be Refrigerated?

Before opening, insulin pens should be stored in the refrigerator. Once in use, most pens can be kept at room temperature (typically up to 28 days—check the label). But, avoid extreme heat or freezing conditions.

For travel or hot weather, use an insulin pen cooler to keep your insulin temp-stable while you’re away from home. This Frio insulin pouch (affiliate link) is my go-to cooler. 

Insulin Pens for Type 2 Diabetes

Insulin pens for type 2 diabetes are often used when oral medications alone aren’t enough. Many people living with type 2 diabetes start with a long-acting insulin with a once-daily dose. Pens can make starting insulin easier and less intimidating.

Insulin pens are also helpful for people with vision or dexterity issues. The dial and click system can be easier to manage than a syringe and vial.

Pros and Cons: Insulin Pens vs. Other Delivery Methods

Tips for First-Time Users

If you’re just getting started with insulin pens, here are a few tips to help you feel confident:

• Injection Sites: Rotate sites (abdomen, thigh, arm) to prevent your skin from developing scar tissue and/or your skin becoming over-saturated with insulin.
• Needles: Always use a new insulin pen needle for each injection.
• Traveling: Use an insulin pen cooler and carry your prescription.
• Storage: Keep unopened pens in the fridge; store opened pens at room temp.
• Practice: Ask your diabetes educator to show you how to use your pen properly.
• Safety: Dispose of pen needles in a sharps container.

Final Thoughts: Is an Insulin Pen Right for You?

Insulin pens offer simplicity, portability, and comfort… especially for people with busy lives or those new to insulin. They’re a great option, but like any tool, there’s pros and cons.

If you’re wondering whether a pen is the right choice, ask your doctor:

• Which type of insulin do I need?
• Should I use a reusable or disposable pen?
• How many injections will I need per day?
• Are there savings programs for certain insulin pen brands?

Choosing the right delivery method is a personal decision, and your healthcare team can help you find the best fit.

Sources

1. Insulin Pens Consumer Guide, American Diabetes Association, (2025).
2. Connected Insulin Pens and Caps: Expanding Access and Insight, ADCES, (2025).
3. Trends in Insulin Pen Priming, Clinical Diabetes Therapeutics, (2018).