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Education Guide

What Is Compounded Medication?

Compounded medications are custom-made by specialized pharmacies for individual patients. Instead of one-size-fits-all, a compounding pharmacist prepares your specific formulation. the right active ingredient, concentration, and delivery format for your condition.

Pharmaceutical compounding is the practice of creating customized medications by combining active pharmaceutical ingredients in specific concentrations and delivery formats. Compounding pharmacies are licensed, regulated facilities staffed by specialized pharmacists. Approximately 3% of all US prescriptions are compounded. filling the gap where mass-manufactured drugs don't meet an individual patient's needs.

7,500+
Compounding pharmacies in the US
3%
Of all prescriptions are compounded
100%
Ketro RX made per patient
Last updated March 25, 2026
Topical medication applied to upper back
The Basics

Compounding at a Glance

What It Is

The preparation of a customized medication by a licensed pharmacist, combining active pharmaceutical ingredients in a specific formulation based on a physician's prescription.

Who Does It

Licensed compounding pharmacies staffed by specialized pharmacists. There are over 7,500 compounding pharmacies in the US, ranging from local pharmacies to large-scale facilities.

Regulation

Regulated by state boards of pharmacy (503A pharmacies) and the FDA (503B outsourcing facilities). Active ingredients must meet USP (United States Pharmacopeia) quality standards.

Prescription Required

Yes. compounded medications containing prescription-active ingredients require a valid prescription from a licensed physician. The doctor evaluates your condition before prescribing.

Why It Exists

Mass-manufactured drugs come in fixed formulations. Compounding fills the gap. personalized dosing, alternative delivery formats, allergen-free options, and combinations not commercially available.

Ketro RX

Compounded by Precision Compounding Pharmacy (US-licensed). Each order is individually prepared after a physician reviews and approves your prescription. Shipped directly to you.

How It Works

The Compounding Process

From physician prescription to finished medication. Every compounded medication follows a controlled preparation process with quality checks at each stage.

1
Physician Writes the Prescription

A licensed physician evaluates your condition, health history, and current medications. If a compounded formulation is clinically appropriate, the physician writes a prescription specifying the active ingredient(s), concentration, and delivery format. With Ketro, this step is an online consultation. a licensed doctor reviews your information and makes the prescribing decision.

2
Pharmacy Receives and Verifies

The compounding pharmacy receives the prescription and verifies it. confirming the physician's credentials, reviewing the formulation for safety and drug interactions, and sourcing the active pharmaceutical ingredients. All ingredients must meet USP (United States Pharmacopeia) quality and purity standards.

3
Pharmacist Compounds the Medication

A specialized compounding pharmacist prepares the medication in a controlled environment. For topical formulations, this means combining the active ingredient(s) with the base vehicle, penetration enhancers, and stabilizers in precise quantities. The pharmacist follows a master formulation record with exact procedures and measurements.

4
Quality Testing and Verification

The finished medication undergoes quality checks. potency verification, pH testing, visual inspection, and documentation. The pharmacy maintains records of every compound prepared, including the ingredients used, the pharmacist who prepared it, and the lot numbers of all raw materials. This creates a complete audit trail.

5
Labeled, Packaged, and Shipped

The compounded medication is labeled with your name, the prescribing physician, active ingredients, concentration, directions for use, and beyond-use date. It's packaged for stability during shipping and sent directly to you. With Ketro RX Pain Gel, the entire process. from physician consultation to delivery. happens without a single office visit or pharmacy trip.

Key Difference

Compounded vs. Mass-Manufactured

Both use the same active pharmaceutical ingredients. The difference is standardized mass production vs. individualized preparation. Compounding allows customization that mass manufacturing cannot. different concentrations, delivery formats, and ingredient combinations tailored to the patient.

Compounded Medication

Individually prepared by a licensed pharmacist for a specific patient based on a physician's prescription.

  • Customizable concentration and dosage
  • Multiple active ingredients in one formulation
  • Alternative delivery formats (topical, sublingual)
  • Allergen-free options available
  • Prepared per order. fresh supply
  • Physician-prescribed, pharmacist-prepared
Mass-Manufactured

Produced in large batches by pharmaceutical companies with a fixed formulation, concentration, and delivery format.

  • Fixed concentration. one size fits all
  • Single active ingredient per product
  • Limited delivery formats
  • May contain allergens or fillers
  • Sits on warehouse shelves. variable freshness
  • FDA-approved through clinical trials
Side by Side

Compounded vs. OTC Topical Pain Relief

How compounded topical pain medication compares to mass-manufactured OTC alternatives available at the pharmacy.

Factor Compounded Topical (Ketro RX) OTC Topical NSAID (Voltaren) OTC Menthol/Camphor
Active Ingredient Ketorolac (prescription-strength (higher potency than OTC diclofenac)) Diclofenac 1% Menthol, camphor (counterirritants)
Mechanism COX inhibitor. blocks inflammation COX inhibitor. blocks inflammation Cooling/warming sensation. masks pain
Customizable Yes. concentration, base, enhancers No. fixed formulation No. fixed formulation
Prescription Required Yes No (1% OTC) No
Potency Prescription-strength OTC-strength No anti-inflammatory activity
Penetration Enhancers Custom. optimized for absorption Standard formulation Typically none
Freshness Made per order Mass-produced, warehouse stock Mass-produced, warehouse stock
Per Patient
Every Ketro RX Pain Gel is compounded individually by Precision Compounding Pharmacy after a physician reviews and approves your prescription. The formulation uses prescription-strength ketorolac with custom penetration enhancers. a combination that doesn't exist as a mass-manufactured product. This is the fundamental advantage of compounding: the medication is built for the application, not for the broadest possible market.
Why It Matters

Why Topical Pain Relief Benefits from Compounding

Mass-manufactured topical pain products are limited to what works for the widest market. Compounding allows formulations designed for specific clinical outcomes.

Prescription-Strength Concentrations

OTC topical NSAIDs are limited to low concentrations. Voltaren is capped at 1% diclofenac. Compounding pharmacies can prepare topical formulations at prescription-strength concentrations of more potent active ingredients. Ketro RX uses ketorolac, a prescription-strength NSAID, in a compounded topical formulation that doesn't exist as a mass-manufactured product.

Custom Penetration Enhancers

The base vehicle and penetration enhancers determine how effectively a topical medication crosses the skin barrier and reaches the underlying tissue. Compounding pharmacies can formulate custom base vehicles with specific enhancers optimized for the target tissue depth and body area. Mass-manufactured products use a single standardized base for all applications.

Multi-Drug Formulations

Compounding allows multiple active ingredients to be combined in a single topical formulation. an anti-inflammatory plus a muscle relaxant, for example, or an analgesic with a nerve agent. Mass-manufactured products are limited to a single active ingredient per product. This is particularly valuable for pain conditions that involve multiple pathways. inflammation, muscle tension, and nerve sensitization simultaneously.

Concentration Adjustments

Different pain conditions and body areas may respond optimally to different concentrations of the same active ingredient. Compounding allows physicians to adjust the concentration based on clinical response. If a standard concentration is insufficient, the physician can prescribe a higher concentration. If a patient is sensitive, the concentration can be reduced. This flexibility doesn't exist with fixed-dose manufactured products.

Regulation & Safety

Is Compounded Medication Regulated?

Yes. Compounding pharmacies operate under a regulatory framework that includes state boards of pharmacy, federal oversight, and industry accreditation standards.

Regulatory Framework
  • State boards of pharmacy license and inspect compounding facilities
  • 503A pharmacies: state-regulated, compound per individual prescription
  • 503B outsourcing facilities: FDA-registered and inspected
  • Active ingredients must meet USP (United States Pharmacopeia) standards
  • PCAB (Pharmacy Compounding Accreditation Board) voluntary accreditation
  • LegitScript certification verifies pharmacy legitimacy (Ketro is LegitScript certified)
What to Verify
  • Confirm the pharmacy is licensed in your state
  • Look for PCAB accreditation or equivalent quality certification
  • Verify the prescription comes from a licensed physician
  • Check that the pharmacy uses USP-grade ingredients
  • Ask about quality testing procedures (potency, sterility for sterile compounds)
  • LegitScript certification confirms the pharmacy meets regulatory standards
LegitScript Certified
Ketro is LegitScript certified. meaning our operations, pharmacy partnerships, and prescription processes have been independently verified against healthcare legitimacy standards. LegitScript certification is required by major advertising platforms (Google, Meta, Microsoft) for companies selling prescription healthcare products. It's an independent validation that the business operates within regulatory and legal frameworks.
Dermatologist Tested, LegitScript Certified, FDA Registered Facility
The Product

Ketro RX Pain Gel. Compounded Per Patient

Prescription-strength topical ketorolac. Compounded by Precision Compounding Pharmacy. Originally formulated for the Boston Red Sox.

Ketro RX Pain Gel. prescription-strength compounded topical ketorolac
Compounded Per Patient
RX Pain Gel

Ketro RX Pain Gel is compounded by Precision Compounding Pharmacy. a licensed US facility. The formulation uses prescription-strength ketorolac with custom penetration enhancers for optimized transdermal delivery. Originally formulated for the Boston Red Sox training staff. Each order is individually prepared after a physician reviews and approves your prescription.

  • Prescription-strength ketorolac. compounded topical
  • prescription-strength ketorolac, one of the most potent NSAIDs available for topical use (Voltaren)
  • Custom penetration enhancers for transdermal delivery
  • Compounded per order by Precision Compounding Pharmacy
  • Online physician consultation included
  • Originally formulated for the Boston Red Sox
Get Started
Ketro CALM Magnesium Cream. daily topical magnesium
No Prescription Needed
CALM Magnesium Cream

For daily muscle tension and soreness. Premium topical magnesium. OTC, no prescription. Pairs with RX Pain Gel for a complete approach.

  • Premium transdermal magnesium
  • Skincare-formulated, non-greasy
  • Available over the counter
Shop CALM
Common Questions

Compounding FAQ

A compounded medication is a custom-made pharmaceutical preparation created by a licensed compounding pharmacy for an individual patient based on a physician's prescription. Unlike mass-manufactured drugs produced in factories by the millions, compounded medications are prepared one at a time. the pharmacist combines active pharmaceutical ingredients in specific concentrations and delivery formats tailored to the patient's needs.
Yes, when prepared by a licensed, reputable compounding pharmacy. Compounding pharmacies are regulated by state boards of pharmacy and must follow strict standards for ingredient sourcing, preparation, quality testing, and sterility (for sterile compounds). Many also hold accreditation from PCAB (Pharmacy Compounding Accreditation Board) or are LegitScript certified. Ketro RX Pain Gel is compounded by Precision Compounding Pharmacy, a licensed US facility.
Compounded medications are not individually FDA-approved products, but they are legal and regulated. Compounding pharmacies operate under Section 503A or 503B of the Federal Food, Drug, and Cosmetic Act. The active pharmaceutical ingredients used in compounding must meet USP (United States Pharmacopeia) standards. State boards of pharmacy regulate and inspect compounding facilities. The FDA oversees compounding at the federal level, particularly for 503B outsourcing facilities.
Physicians prescribe compounded medications when a patient needs something that isn't available as a mass-manufactured product. a specific dosage, a different delivery format (topical instead of oral), a combination of multiple active ingredients in one formulation, or a version free of specific allergens or inactive ingredients. Compounding allows the physician to customize the medication to the patient rather than fitting the patient to the available products.
Mass-manufactured drugs are produced in large batches by pharmaceutical companies, with a single fixed formulation, concentration, and delivery format. They are FDA-approved through clinical trials. Compounded medications are individually prepared by a pharmacist based on a physician's prescription. They can be customized in concentration, delivery method, and ingredient combination. Both use the same active pharmaceutical ingredients. the difference is standardized production vs. individualized preparation.
Ketro RX Pain Gel is compounded by Precision Compounding Pharmacy, a licensed US compounding facility. Each order is individually prepared after a physician reviews and approves the patient's prescription. The formulation uses prescription-strength ketorolac in a topical gel base with penetration enhancers designed to deliver the medication through the skin. The formula was originally developed for the Boston Red Sox training staff.
Yes. Compounded medications that contain prescription-active ingredients (like ketorolac) require a valid prescription from a licensed physician. The physician evaluates your health history, current medications, and the specific condition being treated before writing the prescription. With Ketro, an online physician consultation is included. a licensed doctor reviews your information and, if clinically appropriate, prescribes the medication.
Section 503A pharmacies compound medications based on individual patient prescriptions. one prescription at a time. They are primarily regulated by state boards of pharmacy. Section 503B outsourcing facilities can compound medications in larger batches without individual prescriptions and are registered with and inspected by the FDA. Both must follow quality standards, but 503B facilities have additional federal oversight.
Compounding allows topical pain formulations to be customized in ways mass-manufactured products cannot. The pharmacy can adjust the active ingredient concentration, add penetration enhancers that optimize skin absorption for specific body areas, combine multiple active ingredients in a single formulation, and use base vehicles designed for fast absorption and clean skin feel. Mass-manufactured topical NSAIDs like Voltaren come in a single fixed concentration (1% diclofenac). compounding allows prescription-strength concentrations of more potent ingredients like ketorolac.
Insurance coverage for compounded medications varies by plan. Some insurance plans cover compounded prescriptions; others do not. HSA and FSA funds can typically be used for compounded medications with a valid prescription. Ketro RX Pain Gel is priced transparently. the cost includes the online physician consultation, the compounded medication, and direct shipping to your door.
References

Sources & Citations

  1. U.S. Food and Drug Administration. Compounding Laws and Policies. FDA.gov. Compounding
  2. National Association of Boards of Pharmacy (NABP). Compounding Standards and State Regulations. nabp.pharmacy
  3. Alliance for Pharmacy Compounding. Understanding Compounding. a4pc.org
  4. United States Pharmacopeia (USP). General Chapters <795> Pharmaceutical Compounding. Nonsterile Preparations and <797> Pharmaceutical Compounding. Sterile Preparations.
  5. Pharmacy Compounding Accreditation Board (PCAB). Accreditation Standards for Compounding Pharmacies. pcab.info
  6. LegitScript. Healthcare Merchant Certification Program. legitscript.com
  7. Derry S, Conaghan P, Da Silva JAP, et al. Topical NSAIDs for chronic musculoskeletal pain in adults. Cochrane Database of Systematic Reviews. 2016. doi:10.1002/14651858.CD007400.pub4
Compounded Per Patient. Shipped Direct.

Prescription-strength topical ketorolac. Online physician consultation included. Compounded by a US-licensed pharmacy.

This content is for informational purposes only and does not constitute medical advice. Consult a healthcare provider before starting any new treatment. Individual results may vary. Ketro RX Pain Gel requires a prescription. a licensed physician reviews your health information before prescribing. Compounded by Precision Compounding Pharmacy, a licensed US compounding facility. Ketro is LegitScript certified. Compounding statistics based on industry estimates from the Alliance for Pharmacy Compounding and published regulatory data.

Ketro RX Pain Gel
Compounded per patient by US-licensed pharmacy