Hormone Pellets for Menopause: 5 Questions Before the Insertion

Hormone pellets are small cylinders of estradiol, testosterone or both, placed under the skin of the hip or buttock through a tiny cut. They release hormone for months, so you don’t have to remember a pill, patch or gel. Pellets are often marketed as “bioidentical,” and insurance may not cover them. Before you book an insertion, bring these five questions so the decision rests on more than the convenience.

What national guidance says first

Hormone therapy is the most effective treatment for hot flashes and night sweats, according to the 2022 Menopause¹ Society position statement. The statement adds that risks depend on the type, dose, route and timing of the hormones.¹ The debate is about pellets and compounded products, not about hormone therapy itself.

• ACOG² (the American College of Obstetricians and Gynecologists) says compounded “bioidentical” hormone therapy should not be prescribed routinely when FDA-approved products exist. It notes that many compounding pharmacies use “bioidentical” as a marketing term, and that evidence for claims of extra safety and effectiveness is lacking.²
• The National Academies reviewed the evidence for the FDA and found it insufficient to support the clinical use of compounded bioidentical hormones. They suggested limiting them to people allergic to an ingredient in an approved product, or who need a dosage form approved products don’t offer. They singled out pellets for possible inclusion on the FDA’s Difficult to Compound List, citing the complex delivery and the lack of required bioavailability testing.³
• For testosterone, an international consensus endorsed by the Menopause¹ Society and other groups says preparations that produce supraphysiologic, meaning above normal female, testosterone levels, “including pellets and injections,” are not recommended.⁴

Some clinicians do use estradiol pellets. A 2025 review found they kept estradiol levels steady for four to six months and controlled hot flashes. It linked problems such as bleeding, tachyphylaxis (symptoms returning sooner even with high hormone levels) and very high levels mainly to excessive doses, reinserting too early, or missing uterine protection. The authors called for long-term studies to standardize protocols.⁵

1. “Is this pellet compounded, or an FDA-approved product?”

Ask for the exact hormone, the dose in milligrams and the pharmacy that makes it. If it is compounded, ask why an FDA-approved patch, gel, spray, ring or pill isn’t suitable for you. The National Academies’ two reasons are an ingredient allergy or a dosage form that isn’t otherwise available.³

Try: “Which approved options did you consider for me, and why do you think a compounded pellet is the better fit?”

2. “What happens if the dose turns out too high?”

A pellet can’t be adjusted the way you can lower a gel dose or take off a patch. Ask what side effects you might notice, what the clinic would do if they happen, and how long the pellet would keep releasing hormone.⁵

If testosterone is included, ask what blood level the clinic aims for and how that compares with the normal female range, given the consensus warning about supraphysiologic levels.⁴

3. “How will you protect my uterus?”

If you still have a uterus, estrogen without a progestogen raises the risk of the lining overgrowing. The 2025 pellet review lists missing endometrial protection as a source of safety problems.⁵ Ask what progestogen you will take, in what form, and what to do about any bleeding.

Try: “If I start spotting or bleeding, who do I call, and how soon do you want to see me?”

4. “How will you decide when I need the next one?”

Ask whether reinsertion is based on your symptoms, a blood test or a fixed calendar, and what levels must fall to before another pellet goes in. The 2025 review linked tachyphylaxis and high levels to reinserting too early.⁵ If symptoms return quickly, ask about checking your levels before adding another pellet.

5. “What will this cost over a year, and does insurance pay any of it?”

Ask for the price per insertion, how many insertions a year the clinic expects, and the charges for lab work, visits and any progestogen. Check with your insurer whether the pellet, the insertion procedure and the labs are covered. Get the answer in writing before the appointment. Then compare that yearly total with the price of an approved option your plan covers.

Bring a second opinion if you’re unsure

If you’re weighing pellets against other treatments, a gynecologist or a clinician with menopause training can go through your symptoms, history and options. ACOG² advises clinicians to explain the lack of FDA approval and the risks specific to compounding to anyone who asks for compounded hormones.² You’re entitled to that explanation before you agree to anything.

My Body Changed. Now What? includes a Visit Brief. Use it to write down your symptoms, the treatment being offered and the five questions above, and to record the answers you get. See the book.