Humalog (Insulin Lispro — Rapid-Acting Analogue) 100iu

How it works 
Humalog’s lispro formulation changes the insulin molecule to speed absorption after subcutaneous injection—producing a rapid onset and shorter duration compared with regular insulin.

Onset • Peak • Duration (typical)

• Onset: ≈ 10–20 minutes

• Peak: ≈ 1–2 hours

• Duration: ≈ 3–5 hours

Formulations & concentration

• Most commonly U-100 in vials and prefilled pens.

• Different Humalog pen types exist (check product label for specific handling).

Storage & handling (general guidance)

• Unopened: Refrigerate (2–8°C) until expiration; do not freeze.

• Opened/after first use: Typically stable at room temperature for up to 28 days (manufacturer guidance may vary by specific pen or vial); follow label instructions.

• Protect from heat and sunlight.

Common side effects & safety

• Hypoglycemia — most significant risk. Know recognition and treatment.

• Injection-site reactions and potential lipohypertrophy; rotate injection sites.

• Weight gain may occur.

• Rare systemic allergic reactions.

Drug interactions & precautions

• Multiple drugs and conditions can alter insulin needs. Always review concurrent medications with your clinician. Adjustments needed for shifts in diet, activity, illness, or stress.

Practical notes

• Because of rapid action, dosing timing relative to meals is important (follow clinician guidance).

• Insulin dosing is highly individualized — never use another person’s insulin regimen as a template.