Compounded vs brand-name medications: what’s the difference?

A brand-name or generic medicine has been reviewed and approved by the FDA. A compounded medicine hasn’t: a pharmacy prepares it for an individual prescription, and the FDA says it does “not verify the safety, effectiveness or quality of compounded drugs before they are marketed.” That one difference runs through everything else, from how the medicine was tested to what a telehealth company may say about it.

Compounded products are now common online: GLP-1 injections, ED chewables, hair-loss sprays, hormone creams and peptides. Here is how they differ from approved drugs, when compounding makes sense, and what each costs.

Brand-name, generic and compounded, side by side

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A generic is not a compounded drug. Generic sildenafil and finasteride are FDA-approved and sold under the same label as Viagra and Propecia. The confusion matters because some sellers have described compounded products as “generic” versions of a brand, a claim the FDA has warned telehealth companies against.

The two kinds of compounder

The FDA’s compounding guide describes two routes:

• 503A pharmacies. A licensed pharmacist in a state-licensed pharmacy compounds for an individual patient’s prescription. These pharmacies aren’t held to the federal manufacturing quality rules (CGMP); state boards of pharmacy oversee them day to day, and the FDA inspects for cause.
• 503B outsourcing facilities. These register with the FDA, must follow CGMP, and are inspected on a risk-based schedule.

Most online programs use 503A pharmacies. Ask which one fills your prescription, and check its license with your state board of pharmacy.

When compounding makes sense

The FDA describes compounding as a way to treat “a patient who cannot be treated with an FDA-approved medication.” Real examples include a dose that isn’t sold commercially, a form you can take when you can’t use the commercial one, or a medicine whose approved product is no longer made. Sermorelin is a case of the last kind: its approved product, Geref, was discontinued, and the FDA found that wasn’t for safety reasons, so pharmacies may compound it.

Compounding fits less well when an approved product exists and would work for you. Since the semaglutide shortage ended in February 2025 and the tirzepatide shortage in late 2024, pharmacies may compound those drugs only for an individual patient’s needs, and not regularly or in large amounts when the result is essentially a copy of an approved drug (FDA). On April 30, 2026, the FDA proposed excluding semaglutide, tirzepatide and liraglutide from the 503B bulks list, the list of ingredients outsourcing facilities may compound from.

What the FDA has flagged

• GLP-1 marketing. On March 3, 2026, the FDA warned 30 telehealth companies over how they marketed compounded GLP-1s, including claims that implied their products were the same as FDA-approved drugs.
• ED chewables. In September 2025, the FDA sent warning letters to telehealth sellers of compounded ED products, including BlueChew, over claims about their products.
• Topical finasteride. On April 22, 2025, the FDA alerted patients and prescribers to the risks of compounded topical finasteride, citing 32 adverse event reports from 2019 to 2024, including erectile dysfunction and depression.
• Hormone creams. A 2020 National Academies report recommended compounded bioidentical hormones only for patients who can’t use an approved product (RAPS).

Price: compounded vs approved, by category

Compounded products are often cheaper, but not always, and the gap varies by category. These ranges take each online provider’s lowest ongoing monthly price with any required membership included, as of October 2026; brand-name prices are manufacturer self-pay prices.

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In ED, hair loss and menopause, the FDA-approved generic is often the cheaper choice. In weight loss, compounded GLP-1s usually cost less than the brands self-pay, though insurance or the Medicare GLP-1 Bridge can reverse that.

Questions to ask before you choose a compounded medicine

• Is there an FDA-approved option that would work for me? If so, ask your clinician why compounded is better for you.
• Which pharmacy prepares it, and is it 503A or 503B? Check the license.
• What exactly is in it, and at what strength? Combination products add ingredients, and each keeps its own risks.
• Does the price change with my dose? Many compounded plans are priced by dose.
• What happens if the rules change? Compounding rules for GLP-1s and peptides have changed several times since 2024.

Be wary of any seller that calls a compounded product “generic Wegovy,” says it has “the same active ingredient” as a brand, or calls it FDA-approved. Those are the claims the FDA has written to telehealth companies about.

Where this applies on our site

• Weight loss: is compounded semaglutide still legal and safe, compounded tirzepatide vs Zepbound, compounded GLP-1s.
• ED: compounded ED chewables.
• Hair loss: topical vs oral finasteride.
• Menopause: bioidentical vs synthetic HRT.
• Testosterone: FDA-approved topical testosterone comes as gels and solutions; testosterone creams sold online are compounded. See testosterone injections vs cream.
• Peptides: are peptides legal.

The bottom line

Brand-name and generic medicines are FDA-approved; compounded medicines are prepared by a pharmacy for your prescription and aren’t reviewed by the FDA before they’re sold. Compounding is useful when no approved product fits you, and it can save money on GLP-1s, but in ED, hair loss and menopause the approved generic is often both cheaper and better studied. Ask your clinician whether an approved option would work, and know which pharmacy makes what you take.