Insulin Clinics / Starting and managing

Starting insulin therapy

Most people who start insulin describe the same mix of feelings: fear of needles, fear of low blood sugar, and a sense of having failed. None of those reactions are unusual, and none of them mean you are bad at managing diabetes.

Last updated: October 2026 · Based on ADA Standards of Care, FDA prescribing information, and NIDDK · General information, not medical advice — see our editorial policy

The feelings come first, and that is okay

Diabetes researchers have a name for what most people experience when insulin is recommended: psychological insulin resistance. It is the well-documented set of fears, beliefs, and grief reactions that makes starting insulin emotionally hard, separate from anything physical. Estimates vary widely between studies, but often a quarter to more than half of adults with type 2 diabetes are reluctant to start insulin when it is first offered.

The most common worries are predictable, and worth naming directly:

• "I failed." Type 2 diabetes is a progressive disease. Beta cell function declines over time for biological reasons, not because you ate the wrong thing five years ago. Adding insulin is matching the treatment to where the disease has moved.
• "Insulin causes complications." The opposite is true: high blood sugar causes complications, and insulin lowers blood sugar. The association people sometimes notice — that someone they know started insulin and got sicker — usually reflects how late insulin was started, not insulin itself.
• "I'm afraid of needles." This fear is real, but the needles used today are very different from the needles people remember from blood draws or vaccines. Pen needles are now commonly 4 mm long and very fine — many people describe the sensation as a small flick, not a sting.
• "I'll have a low and not wake up." Severe lows are uncommon with modern long-acting insulins, especially at the small starting doses used in type 2 diabetes. The risk is real but manageable, and the page on low blood sugar covers exactly what to do.
• "My life will revolve around shots." Many people start with a single injection of basal insulin once a day. That is one dose, taken at the same time each day — morning or evening, depending on the insulin.

What happens at the first appointment

The first insulin visit is usually scheduled with extra time — often with a diabetes educator, nurse, or pharmacist as part of the team. Roughly what to expect:

1. A review of where you are now. Your A1C, recent home readings if you have them, your other medications, your kidney function, your weight, and any history of low blood sugar.
2. A discussion of the regimen. For most people with type 2 diabetes, the starting point is a basal insulin once a day. Guidelines describe deliberately small starting doses — either a fixed small amount or one based on body weight — that are then raised gradually by the care team based on your readings — your own starting dose and adjustment schedule should come from your prescriber, in writing. For type 1 diabetes, the starting plan involves both basal and mealtime insulin from day one and is usually managed with a specialist.
3. A device demo. If you are using a pen, the team will show you how to attach a needle, prime the pen, dial the dose, and inject. You will usually do at least one practice injection, sometimes with saline, in the office.
4. Hypoglycemia education. What low blood sugar feels like, when it is most likely to happen, and how to treat it with 15 grams of fast-acting carbohydrate. Current ADA guidance is that everyone who takes insulin should have a glucagon prescription, so the visit may include one, and family members may be shown how to use it.
5. A monitoring plan. How often to check blood glucose, what readings to look for, and how to share them with the team. ADA guidance recommends that people taking insulin — including once-daily basal insulin — be offered a continuous glucose monitor (CGM).
6. A follow-up. A phone or video check-in within 1–2 weeks to look at the data and adjust the dose. Early follow-up helps the dose reach target safely and sooner.

How clinicians choose a starting regimen

The decision is shaped by several factors and rarely a single number:

• Type of diabetes. Type 1 diabetes essentially always needs basal plus mealtime insulin. Type 2 usually starts with basal alone and adds mealtime insulin only if needed.
• Patterns in your readings. If fasting glucose is high but daytime is mostly fine, basal alone is enough. If readings shoot up after meals, mealtime insulin matters more.
• A1C level. Very high A1C (often above 10 percent) at diagnosis sometimes calls for a more aggressive starting regimen.
• Risk of hypoglycemia. Older adults, people who live alone, people with kidney disease, or anyone with a history of severe lows usually start with the safest, simplest regimen — typically a low-dose, once-daily long-acting basal insulin.
• Cost and access. The regimen has to be one you can afford and refill reliably. A "perfect" plan you stop using after a month is worse than a simpler one you stay on.
• Schedule and dexterity. Shift work, vision problems, arthritis, or a partner's help all change which delivery method makes sense.

The first two weeks

The first two weeks are mostly about getting comfortable with the routine and gathering data, not about hitting a target.

What to track

• Fasting glucose — first reading after waking, before food. This is what most basal dose adjustments are based on.
• One pre-meal and one post-meal reading per day, varied across meals so the week shows a picture of all three.
• Any low readings — the time, the value, what you did, and what you ate beforehand.
• How you are feeling — energy, sleep, mood. These often improve as glucose comes down.

What to expect

• Modest blood sugar improvement in the first few days, then gradual improvement over several weeks to a few months as the dose is titrated.
• Low blood sugar is not an expected part of starting insulin. If a low does happen, treat it with juice or glucose tablets and tell the team about every one — a low with no clear cause usually means the dose needs to come down.
• A small amount of weight gain over the first few months as the body finally stores food efficiently. This levels off.
• Tiredness as your body adjusts to lower glucose levels — sometimes you feel "low" at numbers that used to be normal for you. This is temporary and your perception recalibrates.
• Injection sites may have a tiny red spot or bruise occasionally; this is normal.

What is not normal

• Any low below 70 mg/dL that you cannot explain, or more than one low in a week.
• A low under 54 mg/dL, or any low that needs another person's help.
• Readings that stay very high (for example, above 300 mg/dL) or keep rising, or any high reading while feeling unwell — contact your team, who may change the plan. Do not raise the dose beyond your written plan on your own.
• Vomiting, severe abdominal pain, or fruity-smelling breath, which could mean DKA. See high blood sugar and DKA and seek care immediately.

When to follow up

Most teams will check in within 1–2 weeks, again at 4–6 weeks, and then every few months until A1C is at goal. After that, every 3–6 months is typical. Many adjustments now happen between visits via patient portal messaging or shared CGM data, which means you do not need to wait for an in-person appointment to fix something that is not working.

You should always feel free to message earlier if something is wrong. Calling about a recurring low or a confusing reading is exactly the right thing to do. Insulin doses are routinely adjusted; that is not a sign of failure either.

One last thing

Most people, weeks or months in, describe being surprised by how unremarkable insulin therapy turns out to be. The shots become as routine as brushing your teeth. The fear of the device fades faster than the fear of the diagnosis. What stays with people is usually the relief of having more energy, sleeping better, and feeling like themselves again.

Frequently asked questions