Reviewed by Peptide Treatments Medical Advisory Board
Insulin: Side Effects & Safety
Known side effects, safety considerations, and adverse reaction data for Insulin.
Back to Insulin overviewData source: These side effects are documented in FDA-approved prescribing information.
Reported Side Effects (7 items)
| # | Side Effect |
|---|---|
| 1 | Hypoglycemia (20-30% any, 2-5% severe — primary safety concern) |
| 2 | Weight gain (2-5 kg expected with insulin therapy) |
| 3 | Injection site reactions (5-10%) |
| 4 | Lipodystrophy (<5%, with poor injection site rotation) |
| 5 | Edema (2-5%, transient, early in therapy) |
| 6 | Severe hypoglycemia requiring assistance (0.5-2%) |
| 7 | Hypoglycemic coma (0.1-0.3%) |
Known Drug Interactions
Important: Only documented and contraindicated interactions are shown here. View all interactions including theoretical →
| Drug | Classification | Mechanism |
|---|---|---|
| Sulfonylureas | Documented | Additive hypoglycemia risk — reduce sulfonylurea dose or avoid combination |
| GLP-1 agonists | Documented | May reduce insulin requirements — monitor closely, reduce insulin dose |
| SGLT2 inhibitors | Documented | Possible additive hypoglycemia — usually reduce insulin dose |
| Beta-blockers | Documented | Masks hypoglycemia symptoms (tachycardia, tremor) — patient education crucial |
| Corticosteroids | Documented | Causes hyperglycemia — increase insulin dose during steroid therapy |
| Thiazolidinediones | Documented | Additive fluid retention and edema risk |