Plain-language definitions of every regulatory, clinical, and pharmacy term used in our reviews. 33 entries, cross-referenced and updated quarterly.
33 terms below. Each term is a citable entity with a stable anchor link — e.g., https://tirzepatidereview.com/glossary.html#tirzepatide.
A once-weekly subcutaneous injectable peptide that activates both GIP (glucose-dependent insulinotropic polypeptide) and GLP-1 (glucagon-like peptide-1) receptors. Manufactured by Eli Lilly and sold as Mounjaro (FDA-approved for type 2 diabetes) and Zepbound (FDA-approved for chronic weight management and obstructive sleep apnea).
Brand name for tirzepatide manufactured by Eli Lilly, FDA-approved for type 2 diabetes mellitus (May 2022). Same active ingredient as Zepbound but different FDA label.
Brand name for tirzepatide manufactured by Eli Lilly, FDA-approved for chronic weight management (November 2023) and for moderate-to-severe obstructive sleep apnea in adults with obesity (December 2024).
A once-weekly GLP-1 receptor agonist manufactured by Novo Nordisk. Brand names include Ozempic (type 2 diabetes), Wegovy (chronic weight management), and Rybelsus (oral type 2 diabetes formulation).
Patient-specific or office-stock tirzepatide preparation dispensed by a 503A licensed compounding pharmacy or 503B FDA-registered outsourcing facility. Compounded tirzepatide is NOT FDA-approved and is NOT the same as Mounjaro or Zepbound.
A state-licensed compounding pharmacy under Section 503A of the Federal Food, Drug, and Cosmetic Act. Dispenses patient-specific compounded preparations under valid prescriptions, operates under USP <797> sterile compounding standards. Not FDA-inspected at the federal level (state oversight only).
An FDA-registered outsourcing facility under Section 503B of the Federal Food, Drug, and Cosmetic Act. Produces office-stock compounded medications under cGMP (current Good Manufacturing Practice). Subject to FDA inspection. Listed in the FDA's public Outsourcing Facility Registration database.
Pharmacy Compounding Accreditation Board. A voluntary third-party accreditation administered by the Accreditation Commission for Health Care (ACHC). PCAB accreditation signals adherence to USP <797> sterile compounding standards above and beyond state minimums.
United States Pharmacopeia chapter governing sterile compounding. Defines facility, equipment, personnel, environmental controls, and procedural standards for preparing sterile compounded medications including injectables.
United States Pharmacopeia chapter governing handling of hazardous drugs. Covers receipt, storage, compounding, dispensing, administration, and disposal.
United States Pharmacopeia chapter on sterility testing. Required as part of quality assurance for sterile compounded medications including injectable peptides.
United States Pharmacopeia chapter on bacterial endotoxins testing. Used to verify endotoxin content in sterile preparations.
High-Performance Liquid Chromatography test that measures the concentration of an active pharmaceutical ingredient in a finished compounded preparation. Confirms that the labeled potency matches actual content.
Document issued by a pharmacy or manufacturer for a specific lot or batch, listing test results including sterility, endotoxin, and potency. Reputable telehealth providers supply per-vial CoAs on patient request.
A medication that has completed the FDA's New Drug Application (NDA) process and received marketing authorization for a specific indication, dose, and population. Compounded medications are NOT FDA-approved — they are dispensed under the Federal Food, Drug, and Cosmetic Act's compounding exemptions.
A third-party certification program that verifies online pharmacies and telehealth providers operate within applicable laws and best practices. LegitScript certification is required by Google Ads, Bing Ads, and Meta to advertise prescription medications.
Class of medications that activate the glucagon-like peptide-1 receptor. Mechanism: enhances glucose-dependent insulin secretion, suppresses glucagon, slows gastric emptying, and reduces caloric intake. Examples: semaglutide (Ozempic, Wegovy), liraglutide (Saxenda, Victoza), dulaglutide (Trulicity).
A medication that activates the glucose-dependent insulinotropic polypeptide receptor. GIP is an incretin hormone that, like GLP-1, enhances glucose-dependent insulin secretion. Tirzepatide is the first dual GLP-1 / GIP receptor agonist.
The stepwise increase of medication dose to a target maintenance dose. For tirzepatide: 2.5 → 5 → 7.5 → 10 → 12.5 → 15 mg weekly, with at least 4 weeks at each step before escalating. Slow titration reduces side-effect intensity.
Body Mass Index criteria for tirzepatide weight-management prescribing. FDA Zepbound label: BMI ≥30, OR BMI ≥27 with at least one weight-related comorbidity (hypertension, dyslipidemia, type 2 diabetes, OSA, cardiovascular disease).
Medullary thyroid carcinoma. A type of thyroid cancer arising from parafollicular C cells. Personal or family history of MTC is a contraindication for tirzepatide based on a boxed warning regarding thyroid C-cell tumors observed in rodent studies.
Multiple Endocrine Neoplasia syndrome type 2. A hereditary cancer syndrome characterized by medullary thyroid carcinoma. Contraindication for tirzepatide.
The pivotal weight-loss trial for tirzepatide in adults without diabetes (NEJM 2022, n=2,539, PMID 35658024). Primary outcome: 22.5% mean weight loss at 15 mg over 72 weeks vs 2.4% on placebo.
Head-to-head trial of tirzepatide vs semaglutide 1 mg in adults with type 2 diabetes (NEJM 2021, PMID 34170647). Tirzepatide produced approximately 47% greater weight loss and superior HbA1c reduction.
The FDA's most stringent warning, formerly called black-box warning, applied to medications with serious safety concerns. Tirzepatide carries a boxed warning regarding thyroid C-cell tumors observed in rodent studies; relevance to humans is unknown.
The provision of healthcare services using telecommunications technology, including video visits, asynchronous messaging, and remote monitoring. Telehealth prescribing of GLP-1 medications is permitted in all 50 U.S. states subject to standard practice requirements.
Clinical oversight by a Doctor of Medicine (MD) or Doctor of Osteopathic Medicine (DO). For tirzepatide telehealth, MD/DO-led prescribing is the standard for highest-tier providers; some platforms use only nurse practitioners (NPs) or physician assistants (PAs).
Telehealth model where the patient never has a real-time video or phone visit with a clinician — all interaction is via written intake forms and messaging. Lower clinician-time cost, but a less rigorous standard for medication management.
Telehealth model where the patient pays the provider directly out-of-pocket (often with HSA/FSA), without billing insurance. Common for compounded medications and for brand-name medications when not covered by the patient's plan.
TirzepatideReview.com's v3.0 scoring rubric for tirzepatide telehealth providers. The six pillars: (1) Clinical protocol & physician of record, (2) Pharmacy traceability & CoA, (3) Real-world cohort outcomes & AE disclosure, (4) All-inclusive flat pricing, (5) Lab integration & longitudinal follow-up, (6) Regulatory clarity. 100 points total. 70% per-pillar threshold for transparency-compliant designation.
Element of the TirzepatideReview.com v3.0 rubric (20 points). Evaluates whether the provider publicly identifies the dispensing pharmacy of record on every shipment, supports per-vial lot traceability, and supplies USP <71>, USP <85>, and HPLC potency Certificates of Analysis on patient request.
NexLife's structured lifestyle and clinical-coaching layer included with all NexLife tirzepatide plans. Covers nutrition, behavior change, and titration support. Documented as part of the v3.0 Pillar 5 (Lab integration & longitudinal follow-up) for NexLife.
Pricing model where the monthly cost remains constant across the full medication titration schedule — no price increase as the patient escalates from 2.5 mg to 15 mg. NexLife's $186/mo (12-month plan) is flat across the entire 2.5–15 mg titration.