HRT Delivery Methods Compared: Patch, Gel, Pill, Pellet, Injection and Vaginal

You have already done the hard part. You have decided that the broken sleep, the 3 a.m. sweats and the word that vanishes mid-sentence are worth treating, and that hormone therapy belongs on the table. Then the conversation turns practical and slightly bewildering: patch or gel? Tablet or pellet? Is there an injection? What about the cream you have heard about for vaginal symptoms?

This is the part most articles wave at and move on from. It deserves better, because the delivery route is not packaging. It determines the path a hormone takes into your body, how finely the dose can be tuned once you are on it, how often you think about treatment at all, and in the case of estrogen and clotting, it is one of the few variables you can actually choose.

This guide compares every route in routine use, honestly, including what each one gives up.

Why the Delivery Route Changes More Than Convenience

Two women can take the same hormone, at a comparable dose, and have measurably different experiences depending on how it gets in. The reason is anatomy.

The First-Pass Effect, in Plain Language

Anything you swallow is absorbed from the gut and travels straight to the liver before it reaches the rest of you. The liver processes it on the way through. That is the first-pass effect, and for estrogen it matters, because the liver responds to an estrogen load by changing its output of clotting factors, binding proteins and triglycerides.

A patch, a gel or a pellet bypasses that first pass entirely. The hormone enters through skin or subcutaneous tissue and reaches the bloodstream directly, so the liver sees ordinary circulating levels rather than a concentrated arrival. Same molecule, different journey, different downstream effects.

What the Clotting Data Actually Shows

This is where the difference stops being theoretical. A large UK study of 80,396 women with a venous thromboembolism, matched to 391,494 controls, compared routes directly. Oral preparations were associated with an increased risk of clot compared with no hormone use (adjusted odds ratio 1.58, 95% CI 1.52 to 1.64). Transdermal preparations were not associated with increased risk at all (adjusted odds ratio 0.93, 95% CI 0.87 to 1.01) (Vinogradova et al., BMJ 2019; PMID 30626577).

Two things deserve saying plainly. First, absolute risk matters as much as relative risk: clots are uncommon in otherwise healthy women in their fifties, so a relative increase of this size still translates into a small number of additional events, not a common outcome. Second, that is precisely why route is worth getting right. It is a decision that costs you nothing and is made once.

The same study found estradiol carried lower risk than conjugated equine oestrogen within oral preparations, another reason the specific molecule and the specific route are both worth naming rather than lumping everything together as "HRT."

Transdermal Estradiol: Patches and Gels

Transdermal delivery means through the skin. It is, for many women, the sensible default starting point.

The Patch

An adhesive patch worn on the lower abdomen or buttock, changed once or twice weekly depending on the product. Its strengths are steadiness and forgetfulness-proofing: levels stay flat between changes, and there is no daily step to remember. Its limitations are practical rather than clinical. Adhesive can irritate skin, patches can loosen with heat, swimming or heavy exercise, and rotating sites matters. Dose adjustment happens in the increments the manufacturer makes, which is usually enough but is not infinitely granular.

Gels, Sprays and Compounded Creams

Applied daily to the arm, thigh or abdomen. The advantage over a patch is granularity: dose can be titrated in small steps, which is genuinely useful in perimenopause when the target is a moving one. Nothing sticks to your skin and nothing shows.

Two things to respect. It has to dry before you dress, and skin-to-skin transfer to a partner, a child or a pet is a real consideration, so application site and timing get discussed at the visit rather than left to chance. Compounded creams are prepared by a pharmacy to your prescription and have not been reviewed or approved by FDA, which is exactly why sourcing and ongoing lab monitoring matter more, not less, with this route.

Who Transdermal Tends to Suit

Women with any personal or family history that raises clotting concern, women with migraine with aura, women carrying extra metabolic risk, and frankly most women starting out. It is the route with the fewest trade-offs to explain.

Oral Estradiol: The Tablet

A daily tablet is simple, inexpensive, widely stocked and completely invisible. For a woman with no particular vascular risk who values simplicity, it is a legitimate choice rather than a compromise, and it should not be dismissed.

It is also the route with the most trial evidence behind its long-term vascular story. The ELITE trial randomised 643 postmenopausal women to oral 17-beta estradiol or placebo and found that carotid artery wall thickening progressed more slowly on estradiol than on placebo in women within six years of menopause, but not in women ten or more years out (Hodis et al., NEJM 2016; PMID 27028912). That is the timing hypothesis in one sentence: when you start appears to matter more than most of the twenty-year-old headlines allowed for. It is also not a promise of cardiac protection, since the same trial found no significant difference on cardiac CT measures in either group.

The honest summary of oral: convenient, well studied, and the one route that carries the clotting signal described above. Worth choosing deliberately rather than by default.

Pellets: Implanted and Forgotten

A pellet is a small compressed cylinder of hormone inserted just under the skin, usually in the upper buttock, during a brief in-office procedure. It releases steadily for roughly three to six months.

The appeal is obvious and real: nothing to apply, nothing to remember, no daily decision, and very stable levels for months at a stretch. For women who have already found a dose that works and simply want to stop thinking about it, pellets are excellent.

The trade-off is equally real and rarely stated: once a pellet is in, the dose is fixed until it wears off. There is no dialling back this week and no adjusting next month. That is why pellets suit an established, well-monitored regimen far better than a first attempt, where the whole point of the early months is finding your number. If you want the full picture on this route specifically, we have written it up in hormone pellet therapy pros and cons.

Injections

Most relevant for testosterone, given weekly or twice weekly. Injections offer precise, reproducible dosing and are inexpensive, and self-injection is far less daunting in practice than it sounds in advance. The trade-off is the peak-and-trough pattern between doses, which is why interval and dose get adjusted together rather than separately, and why more frequent smaller doses often feel steadier than larger fortnightly ones.

Vaginal Estrogen: A Local Route, Not a Systemic One

Low-dose vaginal estrogen belongs in a category of its own, and confusing it with systemic therapy causes a great deal of unnecessary worry.

Delivered as a cream, tablet or ring, it treats the tissue directly: dryness, burning, painful intercourse, urinary urgency and recurrent urinary tract infections, collectively the genitourinary syndrome of menopause. Systemic absorption at these doses is minimal. In the Women's Health Initiative Observational Study, 45,663 women were followed for a median of 7.2 years, and among vaginal estrogen users the risks of breast cancer, endometrial cancer, stroke and clotting events did not differ significantly from non-users (Crandall et al., Menopause 2018; PMID 28816933).

It can be used on its own, or alongside a systemic route when genitourinary symptoms persist even after hot flashes settle, which is common. If pain with intimacy is your main symptom, our piece on sexual pain in women goes further into the options.

The Progestogen Rides Along With Your Route

If you have a uterus, systemic estrogen is paired with a progestogen to protect the uterine lining. Which one you take is a separate decision from your estrogen route, and it is not a trivial one.

In the French E3N cohort, 80,377 postmenopausal women were followed and 2,354 invasive breast cancers occurred. Compared with never-use, estrogen combined with micronized progesterone showed a relative risk of 1.00 (95% CI 0.83 to 1.22), estrogen with dydrogesterone 1.16 (0.94 to 1.43), and estrogen combined with other progestagens 1.69 (1.50 to 1.91) (Fournier et al., Breast Cancer Res Treat 2008; PMID 17333341). The same analysis found no difference in breast cancer risk by estrogen route, oral or transdermal, which is a useful reminder that route governs clotting and the progestogen choice governs this.

Micronized progesterone also tends to help sleep, which is a welcome side effect rather than the reason for taking it. The wider evidence comparison sits in our BHRT vs HRT guide.

Testosterone Delivery for Women

Testosterone for women is dosed in a small fraction of what a man receives, which makes the delivery method a question of precision. A compounded cream or gel applied daily allows the fine titration that small doses demand. Pellets are used once a stable dose is established. Whichever route, the point is the same: start low, measure, and adjust against how you actually feel rather than against a target number alone.

How Your Route Gets Chosen at Arbour Longevity

Hormone care at Arbour Longevity in Ann Arbor is led by Gandhi Bhattarai, FNP-BC, PMHNP-BC, Anti-Aging/Functional Medicine BC, a triple board certified nurse practitioner in family practice, psychiatric mental health, and anti-aging and functional medicine.

Choosing a route is a short conversation built on four things: your clotting and vascular history, whether your dose is likely to need frequent adjustment in the coming months, how much daily involvement you want with treatment, and what your baseline labs show. Most women start transdermal, settle on a dose over the first two to three months, and only then consider whether a longer-acting route like pellets is worth switching to. Switching is normal, not a failure, and it is easier than people expect.

Monitoring is what makes any route safe. Which markers we draw and how often is covered in our guide to hormone lab testing and monitoring, and the practical shape of the first twelve weeks is set out in what BHRT costs and what your first three months look like.

Visiting Us

An initial consultation is $35, in person in Ann Arbor or by telehealth across Michigan. The ongoing BHRT program is $299 per month. You can reach the clinic at (734) 436-3357. We are open Thursday through Monday, 10:00 to 19:00, and closed Tuesday and Wednesday.

Parking is free and directly outside, with no meters and no parking structure to navigate. The clinic is Suite 15, down a flight of stairs. Please call ahead if stairs are difficult for you.

Frequently Asked Questions About HRT Delivery Methods

Which HRT delivery method is safest?
For systemic estrogen, transdermal routes have the most reassuring clotting data, with no increased venous thromboembolism risk observed compared with non-use (PMID 30626577). "Safest" still depends on your history, which is why the choice is individualized rather than universal.

Can I change methods later?
Yes, and many women do. Routes are switched routinely as symptoms, dosing needs and life circumstances change. A switch is usually paired with a lab check a few weeks afterwards to confirm the new dose lands where intended.

Do pellets work better than patches or creams?
Not better, differently. Pellets deliver unmatched steadiness and convenience for months at a time. Patches and creams deliver adjustability. Which one wins depends on whether your dose is settled or still being found.

Does the route change how quickly I feel better?
Only modestly. Most women notice sleep and hot flashes improving within a few weeks on any adequately dosed route. What route changes more is how smoothly you get there and how easily the dose can be corrected if the first attempt is not quite right.

Is vaginal estrogen enough on its own?
If your symptoms are confined to dryness, discomfort with intimacy or urinary irritation, often yes. If you also have hot flashes, disrupted sleep or mood changes, a systemic route is usually added, and the two are frequently used together.

Does the patch have to be worn all the time?
Yes, it stays on continuously and is replaced on schedule, including in the shower. Rotating the site each time reduces skin irritation.

References

Vinogradova Y, Coupland C, Hippisley-Cox J. Use of hormone replacement therapy and risk of venous thromboembolism: nested case-control studies using the QResearch and CPRD databases. BMJ. 2019;364:k4810. PMID 30626577. doi:10.1136/bmj.k4810

Hodis HN, Mack WJ, Henderson VW, et al. Vascular Effects of Early versus Late Postmenopausal Treatment with Estradiol. N Engl J Med. 2016;374(13):1221-1231. PMID 27028912. doi:10.1056/NEJMoa1505241

Crandall CJ, Hovey KM, Andrews CA, et al. Breast cancer, endometrial cancer, and cardiovascular events in participants who used vaginal estrogen in the Women's Health Initiative Observational Study. Menopause. 2018;25(1):11-20. PMID 28816933. doi:10.1097/GME.0000000000000956

Fournier A, Berrino F, Clavel-Chapelon F. Unequal risks for breast cancer associated with different hormone replacement therapies: results from the E3N cohort study. Breast Cancer Res Treat. 2008;107(1):103-111. PMID 17333341. doi:10.1007/s10549-007-9523-x

Book a Hormone Consultation in Ann Arbor

If you are weighing a patch against a pellet, or you are already on hormone therapy and suspect the route is the reason it has never quite settled, that is a solvable problem and a short conversation. You can read more about our approach on our hormone replacement therapy in Ann Arbor page.

When you are ready, schedule your hormone consultation with Arbour Longevity — in person in Ann Arbor or by telehealth statewide.

‍