| Insulins and Insulin Analogs | Human insulin Insulin lispro Insulin aspart Insulin glargine Insulin degludec | Type 1 diabetes, insulin-requiring type 2 diabetes, diabetic ketoacidosis, and perioperative glycemic management. | Activates the insulin receptor to promote glucose uptake and suppress hepatic glucose production. | Subcutaneous injection; intravenous administration for selected hospital indications. | Short-, rapid-, intermediate-, and long-acting profiles are available. Dosing is individualized according to meals, glucose levels, and clinical status. | Potency, sterility, cold-chain management, aggregation control, container compatibility, and validated delivery-device performance. |
| GLP-1 Receptor Agonists | Semaglutide Liraglutide Exenatide Dulaglutide | Type 2 diabetes and, for selected agents and approved indications, chronic weight management in people with obesity or overweight with associated risk factors. | Activates the glucagon-like peptide-1 receptor, enhancing glucose-dependent insulin secretion, reducing glucagon secretion, and slowing gastric emptying. | Subcutaneous injection; some formulations of semaglutide are administered orally. | Several agents support once-weekly dosing. Gastrointestinal adverse effects are common, especially during dose escalation. | Peptide purity, acylation or conjugation consistency, concentration accuracy, injection-device compatibility, and temperature-controlled distribution. |
| Dual and Multi-Incretin Peptide Agonists | Tirzepatide | Type 2 diabetes and, where specifically approved, chronic weight management. | Activates glucose-dependent insulinotropic polypeptide and GLP-1 receptors, improving glucose control and influencing appetite and energy intake. | Subcutaneous injection. | Generally administered once weekly with gradual dose escalation to improve gastrointestinal tolerability. | Accurate peptide identity, receptor-activity profile, impurity control, formulation stability, and cold-chain compliance. |
| Parathyroid Hormone Analogs | Teriparatide Abaloparatide | Severe osteoporosis or osteoporosis with a high risk of fracture in selected patients. | Intermittent activation of the parathyroid hormone type 1 receptor stimulates bone formation and increases bone remodeling. | Subcutaneous injection. | Usually used as time-limited anabolic therapy followed by an antiresorptive strategy when clinically appropriate. | Biological activity, peptide oxidation and aggregation, device filling accuracy, sterility assurance, and storage conditions. |
| Calcitonin Peptides | Salmon calcitonin | Selected cases of acute hypercalcemia, Paget disease of bone, and vertebral fracture-related pain where clinically appropriate. | Reduces osteoclast activity and promotes renal calcium excretion. | Subcutaneous, intramuscular, or intranasal administration depending on formulation and indication. | Use is more limited than that of many modern osteoporosis therapies and varies by jurisdiction. | Species origin, immunogenicity assessment, nasal-device performance, potency testing, and regulatory requirements for the intended market. |
| Somatostatin Analogs | Octreotide Lanreotide | Acromegaly, selected symptoms associated with neuroendocrine tumors, and certain secretory gastrointestinal disorders. | Activates somatostatin receptors to suppress growth hormone and several gastrointestinal and pancreatic hormones. | Subcutaneous injection; long-acting intramuscular or deep-subcutaneous depot formulations. | Short-acting and long-acting formulations are available. Long-acting products may reduce administration frequency. | Depot-microsphere or prolonged-release technology, injection-site performance, peptide release kinetics, and sterility validation. |
| Gonadotropin-Releasing Hormone Agonists | Leuprolide Goserelin Triptorelin Nafarelin | Prostate cancer, endometriosis, uterine fibroids, and selected hormone-dependent conditions; use depends on the individual medicine and jurisdiction. | Continuous stimulation of the GnRH receptor initially increases gonadotropins, followed by pituitary receptor desensitization and suppression of sex-hormone production. | Subcutaneous, intramuscular, intranasal, or implant-based delivery depending on the product. | Long-acting depot and implant formulations can provide monthly to several-month dosing intervals. | Depot formation, release-duration consistency, implant dimensions, sterility, and control of initial hormone-release behavior. |
| Gonadotropin-Releasing Hormone Antagonists | Degarelix Relugolix | Advanced prostate cancer and other androgen-dependent conditions according to approved indications. | Directly blocks the GnRH receptor, rapidly reducing luteinizing hormone, follicle-stimulating hormone, and testosterone levels without an initial testosterone surge. | Subcutaneous injection for degarelix; oral administration for relugolix. | Useful when rapid suppression without a flare is clinically important. Dosing schedules differ by active ingredient. | Peptide integrity, formulation solubility, injection-site tolerability, oral absorption characteristics where applicable, and stability testing. |
| Vasopressin and Vasopressin Analogs | Desmopressin Vasopressin | Central diabetes insipidus, nocturnal enuresis, nocturia in selected patients, and treatment of vasodilatory shock or bleeding-related indications depending on the active ingredient. | Desmopressin primarily activates V2 receptors to increase renal water reabsorption; vasopressin activates V1 and V2 receptors. | Oral, sublingual, intranasal, subcutaneous, or intravenous administration depending on the medicine and indication. | Fluid balance and serum sodium require careful monitoring, particularly with desmopressin. | Low-dose accuracy, preservative control, nasal-spray performance, infusion compatibility, and safeguards against medication errors. |
| Natriuretic Peptides | Nesiritide | Selected hospital-based management of acute decompensated heart failure in jurisdictions where use is approved or clinically accepted. | Activates guanylyl cyclase-A receptors, increasing cyclic GMP and promoting vasodilation and natriuresis. | Intravenous infusion. | Hospital use requires hemodynamic monitoring and careful assessment of renal function and blood pressure. | Reconstitution stability, infusion-pump compatibility, potency, particulate control, and short-term storage requirements. |
| Oxytocin Peptides | Oxytocin | Induction or augmentation of labor and prevention or treatment of postpartum uterine bleeding caused by uterine atony. | Activates oxytocin receptors in uterine smooth muscle, producing rhythmic uterine contractions. | Intravenous infusion or intramuscular injection in obstetric settings. | Requires controlled dosing and continuous maternal and fetal monitoring when used for labor induction or augmentation. | Accurate low-concentration dosing, infusion compatibility, sterility, ampoule or vial integrity, and cold-chain requirements where applicable. |
| Gastrointestinal Motility Peptides | Linaclotide Plecanatide | Irritable bowel syndrome with constipation and chronic idiopathic constipation, subject to product-specific indications. | Activates guanylate cyclase-C receptors on the intestinal surface, increasing cyclic GMP, intestinal fluid secretion, and transit. | Oral administration. | Designed for local intestinal action with limited systemic exposure. Diarrhea is a clinically important adverse effect. | Oral stability, moisture protection, capsule or tablet performance, dissolution profile, and strict age-specific labeling requirements. |
| Anticoagulant and Antithrombotic Peptides | Bivalirudin Argatroban | Anticoagulation during percutaneous coronary intervention or in patients with suspected or confirmed heparin-induced thrombocytopenia, depending on the active ingredient. | Directly inhibits thrombin, reducing conversion of fibrinogen to fibrin and limiting thrombus formation. | Intravenous administration. | Short half-lives allow rapid adjustment, but treatment requires coagulation and clinical monitoring. | High-purity peptide synthesis, rapid dissolution, infusion compatibility, potency, impurity limits, and validated anticoagulant activity assays. |
| Antimicrobial Peptides | Daptomycin Colistin | Serious infections caused by susceptible Gram-positive organisms for daptomycin; selected multidrug-resistant Gram-negative infections for colistin. | Daptomycin disrupts bacterial membrane function in a calcium-dependent manner; colistin interacts with bacterial outer membranes. | Intravenous administration; colistin may also be administered by inhalation in selected clinical circumstances. | Reserved for specific infectious-disease situations because of resistance, toxicity, and antimicrobial-stewardship considerations. | Microbiological potency, endotoxin control, nephrotoxicity risk management, reconstitution stability, and antimicrobial susceptibility requirements. |
| Immunomodulatory Peptides | Glatiramer acetate | Relapsing forms of multiple sclerosis. | Modulates immune responses involving T lymphocytes and may shift activity toward anti-inflammatory pathways; its exact mechanism is complex. | Subcutaneous injection. | Administered on a repeated schedule. Local injection-site reactions are common. | Complex mixture characterization, batch-to-batch consistency, molecular-distribution testing, sterility, and immunological activity assays. |