HRT Side Effects

Both estrogen and progestogen can cause side effects, and some overlap with symptoms already present during menopause. Reviewing when a headache or mood change began helps the prescriber assess its possible causes.

Mild early symptoms can settle with time. Severe symptoms or effects that interfere with daily life deserve earlier contact. A prescriber may change the dose, the hormone, or the delivery route after reviewing the problem.

Scheduled bleeding on cyclic treatment

A cyclic or sequential regimen uses progestogen for part of the month. A withdrawal bleed can occur at the end of that course. Ask what pattern is expected with your exact prescription, including whether bleeding outside that pattern needs review.

Unscheduled bleeding

Spotting or irregular bleeding can occur after starting systemic HRT. NICE guidance describes it as common during the first six months, or within three months of changing the dose or preparation. Unscheduled bleeding beyond those timeframes needs prompt assessment. Heavy bleeding, increasing bleeding, or other concerning symptoms warrants earlier help.

Give the clinician the dates, amount, relation to hormone doses, and any missed progestogen. They may review the regimen and investigate the uterine lining or another cause. Do not assume that a new episode of bleeding is harmless because you take hormones.

Progestogen can cause mood changes, breast tenderness, nausea, tiredness, or dizziness. With a cyclic regimen, a dated record may show whether symptoms repeatedly appear during that part of the month. This pattern helps the prescriber review whether the treatment is contributing.

The options can include changing the progestogen, its regimen, or the overall prescription. The choice depends on the estrogen dose, menstrual stage, bleeding, and health history. A consistent pattern is useful evidence, but the clinician should also consider other causes of mood or physical symptoms.

If you have a uterus and use systemic estrogen, do not omit progestogen without a clinical plan. It protects the uterine lining. Tell the prescriber promptly if adverse effects make you skip doses or stop taking it.

Persistent or worsening abdominal swelling, a new breast change, unexplained bleeding, or a substantial change in mood should be assessed. A treatment adjustment may eventually be appropriate, but a new symptom can have another cause.

Bloating is a recognized HRT effect, but it does not establish that a continuing increase in weight is caused by hormones. NHS guidance finds little evidence that most HRT types cause weight gain. Review the timing, fluid symptoms, food intake, activity, and other medicines when weight changes persist.

A headache that becomes severe, changes substantially, or comes with new neurological symptoms needs prompt assessment. Sudden weakness, face drooping, or difficulty speaking calls for emergency help.

• The exact estrogen and progestogen names, doses, and delivery methods.
• The start date and dates of any dose or product changes.
• The symptom pattern, severity, and effect on sleep, work, food intake, or safety.
• Bleeding dates and any missed doses.
• Other new medicines or illnesses around the same time.

A routine three-month review can assess benefit and tolerance, with annual review after treatment is established. You can contact the team sooner for significant side effects. Ask what change is proposed, why it may help, and when to judge the response.

Common side effects and uncommon serious risks are separate parts of follow-up. New symptoms suggesting a clot, stroke, or severe allergic reaction need urgent care. Call 911 for sudden breathing difficulty, chest pain, sudden neurological symptoms, or facial or throat swelling.