One of the most common worries when starting hormone replacement therapy is whether it's working. The honest answer is that different symptoms respond on different timelines — and a few weeks in, some things will already feel better while others will still need patience. This article walks through what to expect when, when to flag concerns to your clinician, and why initial side effects don't mean the treatment is failing.
The first 2 weeks
The earliest improvement most women notice is a reduction in the frequency and intensity of vasomotor symptoms — hot flushes and night sweats. Some women feel this within days; for others it takes a couple of weeks. Sleep often starts to improve at the same time, partly because night sweats stop interrupting it.
Less welcome: the first 2 weeks can also bring spotting, breast tenderness, mild nausea, headaches or bloating. These early-cycle side effects are common and usually settle as the body adapts to the new hormone levels. They are not, on their own, a reason to stop.
Weeks 2 to 8
This is when vasomotor symptoms typically settle to a new baseline — they may not disappear entirely, but they become noticeably less disruptive. Sleep continues to improve. Mood often starts to lift, although the timeline here is more variable. Anxiety, low mood and irritability tied to hormonal changes can take 6 to 12 weeks to respond fully.
Skin and vaginal symptoms — dryness, irritation, painful sex — can improve gradually with systemic HRT, but for some women a topical preparation (vaginal oestrogen) is added because the local effect is faster and more reliable. Vaginal symptoms often respond within 2 to 6 weeks of starting topical treatment.
Months 2 to 3
By 8 to 12 weeks, most women have a clear sense of whether the dose and the regimen are right for them. Hot flushes, sleep and mood should be noticeably better. Side effects that didn't settle in the first weeks should also be settling — if they haven't, that's the conversation to have at your review.
Joint stiffness and aches, which a lot of perimenopausal women don't realise are hormone-related, often improve gradually over this window too.
Why some symptoms respond faster than others
Hot flushes are driven by short-term changes in oestrogen signalling on the brain's temperature-regulation centres. They respond quickly because the mechanism is direct. Mood, sleep architecture and skin/joint changes are downstream effects that take longer to remodel.
It also matters which route you're on. Oral oestrogen and transdermal oestrogen (patches and gels) reach steady-state at different speeds and have different metabolic profiles. A clinician will discuss these trade-offs at consultation.
When to review your HRT
A first review typically happens at around 3 months. Earlier if side effects are severe, persistent bleeding is worrying, or symptoms haven't improved at all. Your clinician will check whether the dose is right, whether the regimen suits your menstrual or post-menopausal status, and whether any specific symptoms need a separate add-on (e.g. vaginal oestrogen).
Persistent breakthrough bleeding after the first 3 to 6 months on a continuous combined regimen warrants investigation. New, sudden or severe pain — chest, leg, abdomen — needs urgent review. So does any sudden visual change. These are uncommon but they are red flags.
Working with your Farmeci clinician
The most useful thing you can bring to your HRT review is honest information about what's changed: which symptoms are better, which are unchanged, which are worse, and what side effects you're noticing. Most adjustments — dose tweaks, switching from oral to transdermal, adding vaginal oestrogen, changing the progestogen — are made on the basis of this kind of practical detail rather than a blood test.