Diabetes Medications Overview
The pharmacological landscape for diabetes management has evolved rapidly. While Type 1 Diabetes is managed exclusively with exogenous insulin, Type 2 Diabetes relies on a stepwise approach encompassing oral agents, non-insulin injectables, and sometimes insulin.
Insulin Therapy
Insulin is categorized by its onset, peak, and duration. Intensive insulin therapy aims to mimic a healthy pancreas using a basal-bolus regimen.
| Type | Examples | Onset | Peak Time | Duration |
|---|---|---|---|---|
| Ultra-Rapid Acting | Fiasp, Lyumjev | ~15 mins | 1 hour | 3 - 4 hours |
| Rapid Acting | Humalog, Novolog, Apidra | 15 - 30 mins | 1 - 2 hours | 4 - 6 hours |
| Long Acting (Basal) | Lantus, Levemir, Basaglar | 1 - 2 hours | Minimal/Peakless | Up to 24 hours |
| Ultra-Long Acting | Tresiba, Toujeo | 2 hours | Peakless | 36 - 42 hours |
For dosing calculations, utilize our Mealtime Bolus Calculator or estimate your Total Daily Dose (TDD).
Oral and Non-Insulin Therapies (Type 2)
Modern Type 2 therapeutics do more than lower glucose; many offer profound cardiovascular and renal benefits.
- Biguanides (Metformin): The first-line therapy. It decreases hepatic (liver) glucose production and improves insulin sensitivity.
- GLP-1 Receptor Agonists (e.g., Ozempic, Trulicity): Injectable medications that stimulate insulin release, inhibit glucagon secretion, and delay gastric emptying, leading to significant weight loss and cardiovascular protection.
- SGLT2 Inhibitors (e.g., Jardiance, Farxiga): Oral agents that prevent the kidneys from reabsorbing glucose, causing excess glucose to be excreted in urine. They offer significant heart failure and kidney protection.
- DPP-4 Inhibitors (e.g., Januvia): Oral agents that prevent the breakdown of naturally occurring GLP-1, modestly improving blood sugar.
Common Prescribing Mistakes
- Delaying insulin initiation: In Type 2 diabetes, clinical inertia—delaying the start of insulin when oral medications fail—can lead to prolonged hyperglycemia and increased risk of complications.
- Ignoring kidney function: Medications like Metformin require dose adjustments or discontinuation based on eGFR (renal function).
Frequently Asked Questions (FAQ)
- Does insulin cause weight gain?
- Insulin is an anabolic hormone and can cause weight gain, particularly if caloric intake is not adjusted, or if defensive eating occurs due to recurrent hypoglycemia.
- Can I take Metformin for Type 1?
- While not FDA-approved for T1D, some endocrinologists prescribe it off-label to patients with Type 1 who exhibit significant insulin resistance.
Next Step: Learn how continuous glucose monitors and insulin pumps integrate with these medications in our Diabetes Technology guide.