Before your first weekly weight injection, tell your own doctor, the one who prescribes your estrogen for menopause, which injection you are starting, and give the injection's prescriber the name of your estrogen tablet. Until both of them have heard, each may know about only one of your two medicines, and both medicines carry a gallbladder warning, the estrogen's and the injection's, with symptoms that overlap. The injections' cautions on absorption are written about medicines taken by mouth, so they concern an estrogen tablet; the gallbladder and pregnancy points apply whatever form your estrogen takes.
The weekly injection and how your estrogen tablet is absorbed
Either weekly injection could change how your estrogen tablet is absorbed, because both slow the emptying of the stomach. Semaglutide, the medicine in the Wegovy injection and the Wegovy tablet, slows stomach emptying and can affect medicines that need to pass through the stomach quickly, and with tirzepatide, the medicine in Zepbound, caution is advised whenever medicines taken by mouth are used with it. Prescribers of Wegovy are directed to monitor the effects of medicines taken by mouth alongside it and to consider closer monitoring for some. Prescribers of Zepbound are directed to monitor medicines that need a certain level in the blood to work, or where a small change in that level matters, such as warfarin.
Slower emptying is the reason to check, not a measured change in your tablet. In trials of the weekly injection, at a lower dose than Wegovy's usual maintenance dose, semaglutide did not affect the absorption of medicines taken by mouth, and in separate studies with semaglutide tablets, ethinyl estradiol, the estrogen in a combined birth-control pill, was among the medicines whose levels showed no clinically significant difference. After a single dose of tirzepatide, the same estrogen reached a lower and later peak in the blood. No study of an estradiol tablet taken for menopause is reported in either injection's label, so none of these findings is a result for yours.
Mention the injection before the first dose rather than waiting for hot flashes to come back. Whether your tablet needs closer watching is for the injection's prescriber and your own doctor to judge, and each of them needs to hear about the medicine the other prescribes before the first dose.
Who decides whether your tablet becomes a patch or gel
No instruction in either injection's label asks a woman on menopause hormone therapy to switch forms, and whether your estrogen moves from a tablet to a patch or a gel is a choice your own doctor helps you make. Hormone therapy for menopause comes in several forms: most are pills taken by mouth, and there are also skin patches, gels or sprays, and vaginal creams, vaginal tablets or rings. Your own doctor can help you choose the type and form that suits you.
Birth-control pills are the only hormones with an instruction of their own in either injection's label. According to the Zepbound label, prescribers should advise patients who take the pill to move to a contraceptive that is not swallowed, or to use a barrier method alongside it, for a period after starting tirzepatide and after each dose increase, and hormonal contraceptives that are not taken by mouth should not be affected. Ask your own doctor whether the same would hold for a menopause patch or gel, and ask the injection's prescriber how they want to keep an eye on your tablet in the meantime.
What both gallbladder warnings mean, with the signs you would notice
If you take both, two separate gallbladder warnings apply, each written about its own medicine, and neither covers the two together. Estrogen may increase the risk of gallbladder disease that may need to be treated with surgery, and for some women hormone therapy may increase the risk of gallbladder disease, with the level of risk depending on the type of hormone therapy, how long it is used, and your medical history and lifestyle. Semaglutide is associated with more gallstones and gallbladder inflammation, and substantial or rapid weight loss can raise the risk of gallbladder disease, though it may also occur without substantial or rapid weight loss (see Pain under the right ribs while weight comes off fast can be the gallbladder). Tirzepatide is associated with more acute gallbladder disease as well.
In November 2025, the FDA announced it would remove the boxed warnings, the ones set apart in a box, from hormone therapy labels. The risks it named were cardiovascular disease, breast cancer and probable dementia, not gallbladder disease, and an estradiol tablet label revised in 2026 still lists gallbladder disease among its less common but serious side effects.
Pain in your upper stomach, yellowing of your skin or eyes, a fever and clay-colored stools are among the gallbladder symptoms listed for semaglutide and for tirzepatide, and for tirzepatide they are to be reported right away. While you take estradiol, pain, swelling or tenderness in the abdomen, and skin or eyes turning yellow, are among the warning signs to call your doctor about immediately. For any of these, call your own doctor's office right away and say that you take both medicines, then tell the injection's prescriber too. Tenderness is the exception: a belly that is tender, or rigid and hard when touched, is one of the signs below that need medical help right away.
With abdominal pain, get medical help right away, or call 911 or the emergency number where you are, if any one of these, among others, is true:
- sudden, sharp pain in the abdomen
- a belly that is tender, or that feels rigid and hard when touched
- pain in or between your shoulder blades, with nausea
- pain in your chest, neck or shoulder
- difficulty breathing
- being pregnant, or possibly pregnant
Who needs to hear about each medicine before the first dose
Your own doctor needs to hear about the injection before it starts. While you take estrogen, tell your own doctor and your pharmacist about the medicines you are taking or plan to take, because your own doctor may need to change the doses of your medicines or monitor you carefully for side effects. With estradiol tablets in particular, some medicines may affect how the tablets work, and the tablets may also affect how your other medicines work. The injection's prescriber needs your list too, and so does your pharmacist: keep a list of your medicines to show them whenever you get a new one (see A weekly weight medicine can change how some of your other tablets work).
The stomach delay is largest after the first tirzepatide dose and diminishes over time, so your own doctor should hear before that dose, not at a hormone review that may be months away. Many providers recommend checking in every three to six months at first, then once a year after treatment is working well.
| Who | What to tell them | When |
|---|---|---|
| Your own doctor, who prescribes your estrogen | Which weekly injection you are starting, and the date of the first dose | Before the first injection |
| The injection's prescriber | The name of your estrogen tablet, every other medicine you take by mouth, and any birth-control pill | Before the first injection |
| The pharmacist who fills either prescription | Your whole list of medicines | Each time a new medicine is added |
Still having periods: the birth-control instruction and pregnancy
The birth-control instruction for tirzepatide is written for hormonal contraceptives taken by mouth, not for menopause hormone therapy, so ask your own doctor whether the hormones you take also prevent pregnancy. While you still have the occasional period, a pregnancy may still be possible: menopause cannot be confirmed until one year after a woman's final period, and a woman who does not want to get pregnant is advised to keep using birth control for at least a full 12 months after her last period (see Is it age or weight loss when you miss periods in your forties?).
Low-dose birth-control pills are among the treatments for very heavy bleeding or periods that are close together around menopause, so ask your own doctor which kind of tablet you have been prescribed. If it is a birth-control pill, the tirzepatide instruction to switch or add a method applies to it (see Can a weekly weight injection make the pill less reliable?).
According to the Zepbound label, tirzepatide may harm an unborn baby and may pass into breast milk, so tell the injection's prescriber if you become pregnant while using it. Semaglutide, according to the Wegovy label, may harm an unborn baby and should be stopped two months or more before you plan to become pregnant; breastfeeding is not recommended during treatment with Wegovy tablets, and whether injected semaglutide passes into breast milk is not known. If you become pregnant while taking estrogen, call your own doctor's office immediately, because estrogen may harm the fetus. Tell the injection's prescriber as well. According to an estradiol tablet label, estradiol tablets should not be used during pregnancy, and the hormone in them can pass into breast milk.
If your injection is compounded or came through NicoCares
The directions above are written for the approved products, Wegovy and Zepbound, and a compounded semaglutide or tirzepatide is not FDA-approved, which means the agency does not review its quality, safety or effectiveness before it is sold. If yours is compounded, ask its prescriber which of those directions they want you to follow.
Through NicoCares, the physician you are connected with is licensed where you live, decides whether to prescribe, and may prescribe a compounded semaglutide or tirzepatide. Tell your own doctor, who prescribes your hormone therapy, about the injection yourself. Name your estrogen tablet where the medical intake asks for your other medications, and repeat it in a message on Spruce Health, the secure messaging service that emails you an invitation to set up an account with your care team. A gallbladder symptom needs an answer right away, and messages in Spruce come with no set answer time, so phone your own doctor's office with one instead. For the emergency signs above, call 911, because NicoCares is not set up as an emergency service.
