Editorial reviews. Affiliate fees from some providers don't affect rankings. Disclosure

No advertiser influenceAffiliate fees disclosedReviewed by board-certified clinicians

HRT · Updated 2026-05-17

HRT side effects: common, rare, and serious

Written byEditorial Team, HormonalHealth PortalReviewed byEditorial Medical Review, MD, NAMS-CMP· Updated May 17, 2026

Short answer: Common (>10%): breast tenderness, bloating, spotting, mood changes — usually resolve in 1-3 months. Serious but rare: VTE (transdermal lowest risk), gallbladder issues, breast cancer increase with long-term combined therapy.

1 min read

Key takeaways

  • ~80% of women tolerate HRT well long-term
  • Adjust dose or route if symptoms persist past 3 months
  • Transdermal estrogen lowest VTE/stroke risk profile

Common (resolves)

Breast tenderness — 50% women in first 2 months, fades. Spotting — common first cycle, investigate if persists past 3 months. Bloating — progesterone-mediated typically. Mood changes can go either way.

Serious (rare)

VTE: transdermal 1.5x background, oral 2-3x. Stroke: minimal increase under 60. Breast cancer: combined HRT +1 case per 1000 women × 5 years. Estrogen-alone slightly protective in WHI re-analysis.

SC
Reviewed by Editorial Medical ReviewBoard-certified OB/GYN · NAMS-certified · Updated 2026-05-17

Was this helpful?

More on HRT

Estrogen types: patch vs gel vs pill vs ring

Transdermal (patch/gel) bypasses liver and has lowest clot risk. Oral estrogen is convenient but increases clot risk. Vaginal rings and creams treat local symptoms without systemic effects.

Read →

How long can you stay on HRT?

NAMS 2022: continue as long as benefits outweigh risks. Most women 5-10 years. No fixed stop date. Re-evaluate annually with clinician.

Read →

Find a provider for HRT

Take the matcher quiz to get a ranked list of telehealth brands tailored to your symptoms.

Take the matcher Browse providers