Duphaston (dydrogesterone) is a progestogen medicine that a gynecologist may prescribe for conditions such as cycle disorders caused by progesterone deficiency, dysmenorrhea, endometriosis, and pregnancy support as part of a medical plan. Do not take it on your own. The pregnancy must be ruled out and the cause of any bleeding diagnosed first. Follow the schedule your doctor sets, and do not stop it except on her instructions.
Duphaston raises many questions among women in Jordan, because it comes up in discussions of delayed or heavy periods, pregnancy follow-up, and IVF. This article explains in simple language when it is prescribed, how it is used, what its side effects are, and when a situation becomes an emergency. It is for education only and does not replace an assessment by a gynecologist.
What is Duphaston and how does it work?
Duphaston (Duphaston) is the brand name for the active ingredient dydrogesterone (Dydrogesterone). It is available as 10 mg tablets and is classified among obstetrics and gynecology medicines. Full pharmacological details are available on the Duphaston page in the drug directory.
To understand how it works, we start with the menstrual cycle itself. The cycle is counted from the first day of one period to the first day of the next. Most cycles last about 28 days, but they can be shorter or longer and still be normal [3]. Each month the body prepares for pregnancy, and if no pregnancy occurs, the uterus sheds its lining [3].
Progesterone is the hormone that helps prepare this lining. Duphaston belongs to the same class, so a doctor prescribes it when the problem is a deficiency of this hormone or an imbalance in its levels. Medical references list low progesterone levels among the factors that may increase the risk of miscarriage [2]. However, this does not mean that every bleeding episode or delayed period is caused by low progesterone.
When does a doctor prescribe Duphaston?
The treating doctor determines the indication after examination and review of medical history. According to the ClinicsJo drug guide, the listed uses include the following:
| Condition | What it refers to |
|---|---|
| Cycle disorders | Delayed, heavy, or irregular periods when the cause is progesterone deficiency |
| Dysmenorrhea and endometriosis | Menstrual pain, and some cases of tissue resembling the uterine lining growing outside the uterus |
| Premenstrual syndrome | Physical and emotional symptoms that precede the period |
| Irregular uterine bleeding | Bleeding outside the usual cycle pattern, after its cause has been assessed |
| Pregnancy support | Threatened miscarriage or recurrent miscarriage, within documented protocols |
| IVF | Luteal phase support, the phase that follows ovulation |
| Hormone replacement therapy | Use alongside estrogen to protect the uterine lining |
This does not mean that every condition on this list needs Duphaston. The decision depends on the cause, age, desire for pregnancy, and test results.
Does Duphaston treat every cycle disorder?
No. A cycle disorder is a symptom with many possible causes, and the medicine suits only some of them. Medical sources such as MedlinePlus describe the common disorders in detail [3]:
- Amenorrhea: absence of periods.
- Oligomenorrhea: periods that come at longer intervals.
- Menorrhagia: very heavy bleeding.
- Dysmenorrhea: painful periods that may be accompanied by severe cramps.
Other causes that a hormone alone does not treat
Heavy periods may be normal for some women, and they may be linked to puberty, the postpartum period, or approaching menopause [1]. In other cases the cause lies in the uterus or ovaries, such as polycystic ovary syndrome, uterine fibroids, endometriosis, adenomyosis, or pelvic inflammatory disease. The cause may also be a blood clotting disorder or certain medicines, and in rare cases uterine cancer [1].
The NHS considers bleeding heavy if you need to change your pad or tampon every one to two hours, if it lasts more than 7 days, or if you pass clots larger than about 2.5 cm [1]. The treatment options it describes include some types of hormonal contraception, tranexamic acid, and prescription anti-inflammatory painkillers [1]. This is why a doctor chooses treatment based on the cause, not on the symptom alone.
For more detail, read the article on menstrual cycle disorders: causes and treatment, as well as the article on when pain or bleeding is abnormal. If your question is about cycle length, here is the answer on normal cycle length.
Why is diagnosis needed before stopping bleeding or inducing a period?
The basic rule emphasized by the drug guide is that medicine should not be used to stop vaginal bleeding before its cause is known. Stopping bleeding without a diagnosis may hide a problem that needs different treatment. The NHS advises seeing a doctor for bleeding between periods or after sex, or for severe pain during a period [1].
If your period is late, the first step is to rule out pregnancy with an appropriate test before using any medicine to bring on a period. Your doctor may order blood tests to find the cause of the disorder, including a check for iron-deficiency anemia when bleeding is heavy [1]. The article on missed periods: when to test for pregnancy and hormones explains what is usually requested.
Duphaston, period pain, and endometriosis
When pain is severe, the cause may be mild dysmenorrhea or endometriosis. Your doctor determines this after examination, and the medicine may be prescribed as part of her plan. Read about menstrual pain and about endometriosis and delayed pregnancy.
Is Duphaston used to support pregnancy and prevent miscarriage?
The medicine is sometimes prescribed to support a threatened miscarriage and recurrent miscarriage within documented protocols, and to support the luteal phase in IVF. However, it must be clear that it is not a substitute for medical assessment. It is part of a plan set by the doctor.
The reason is that once a miscarriage has started, it cannot be stopped [2]. It is often linked to a problem in the development of the pregnancy itself [2]. When there is bleeding during pregnancy, questions, blood or urine tests, and a transvaginal ultrasound are usually used to assess the pregnancy [2]. The ultrasound is what determines whether the pregnancy is healthy, not the medicine.
When is a treatable cause sought?
If miscarriage occurs 3 times or more, women are advised to see a doctor. They are usually referred for tests to look for a treatable cause, along with emotional support [2]. The NHS notes that most women who have had a miscarriage go on to have a successful pregnancy later [2].
The most important advice here: do not stop the medicine on your own because you feel reassured. The decision to stop is made by your doctor at the week specified in her plan.
How is the medicine taken, and why does following the schedule matter?
The usual adult dose listed in the drug guide is 10 mg twice daily. However, this is "the usual dose set by the doctor or pharmacist," not a personal recommendation for you. The dose and duration may vary depending on the condition, whether it is a cycle disorder, pregnancy support, or replacement therapy.
With Duphaston, the start and stop dates relative to the days of the cycle are part of the treatment itself and are not details that can be adjusted. Stopping it at the wrong time may trigger early bleeding. Therefore:
- Write down the start date of your period, the date you start the medicine, and the stop date in a calendar or app.
- Ask your doctor or pharmacist what to do if you miss a dose, and do not double the dose on your own.
- Do not use a prescription pack prescribed for someone else; read can I use a prescription medicine prescribed for another family member?
- Record the start date of each period, as this helps your doctor understand the disorder [3].
In Jordan, the Jordan Food and Drug Administration (JFDA) regulates drug registration and listed prices, and your pharmacist can tell you which products are available. But if you are unsure about a medicine you are buying, ask your pharmacist and do not rely on advice from friends.
What are the side effects of Duphaston, and does it cause weight gain?
According to the drug guide, Duphaston is generally mild. The most commonly reported effects are:
- Mild headache and nausea.
- Breast tenderness and bloating.
- Spotting between periods at the start of use.
- Mild dizziness or drowsiness in a small number of users.
If spotting continues, tell your doctor, as the schedule may need adjustment. As for weight, the guide states that the medicine does not cause significant weight gain, contrary to common belief.
Drug interactions
Interactions are few. Enzyme inducers such as rifampicin and carbamazepine, and St John's wort, may reduce its effect. According to the guide, there is no significant conflict with common painkillers and antibiotics. Therefore, tell your doctor and pharmacist about all the medicines and herbs you use, and read what should I do if I am taking a prescribed medicine and considering an herb?
Who should not take Duphaston, and when is caution needed?
There are conditions in which the medicine is not used or is used with extreme caution, as determined by your doctor:
- Vaginal bleeding of unknown cause, which must be diagnosed before any treatment.
- Progesterone-sensitive tumors.
- Severe liver failure.
- A history of cholestasis during pregnancy, in which case the medicine is used with caution.
The drug guide classifies the medicine as Category B in pregnancy. However, this does not mean it can be used without a prescription. Its use in pregnancy is decided by the doctor alone. If you develop allergy symptoms after taking any medicine, see your doctor, and read about drug allergy.
Do not start, stop, or change the schedule of Duphaston without your doctor's supervision. If your period is late, rule out pregnancy first. If you are pregnant, do not try to compensate for bleeding or pain by taking an extra tablet.
When should you see a doctor, and when should you go to the emergency room?
See a gynecologist soon if:
- Heavy periods affect your life or have lasted for a long time [1].
- You have bleeding between periods or after sex, or severe pain during a period [1].
- You notice a significant change in your cycle, very heavy bleeding, or severe pain [3].
- You feel repeated fatigue or shortness of breath with heavy periods [1].
Contact your doctor immediately if you are pregnant and:
You have spotting or light bleeding, unusual discharge, or fluid leaking from the vagina [2]. Do not take an extra tablet on your own.
Call an ambulance on 911 or go to the nearest emergency department if you are pregnant and have bleeding along with:
- Severe abdominal pain that prevents you from carrying out your daily activities [2].
- Shoulder pain [2].
- Nausea, fainting, dizziness, or loss of consciousness [2].
- Heavy bleeding that soaks through a pad quickly [2].
These signs may indicate the need for immediate treatment [2]. The NHS also notes that miscarriage may occur without symptoms and be discovered on ultrasound [2], so follow-up should not rely on symptoms alone.
How do you find the right doctor or clinic in Jordan?
The appropriate specialty is obstetrics and gynecology. You can browse obstetrics and gynecology doctors in Jordan, or narrow the search by governorate, such as obstetrics and gynecology in Amman, Irbid, Zarqa, Aqaba, or Karak. There are also health centers and maternal and child health centers run by the Ministry of Health in the governorates.
ClinicsJo is a directory for doctors and clinics. It does not provide remote medical consultations or prescriptions, and it does not rank doctors by medical quality. When reviewing any profile, check the following:
- The specialty and experience in the condition that concerns you: cycles, pregnancy, or fertility.
- The clinic location, working hours, and the contact or booking methods available in the profile.
- Whether the clinic offers tests such as ultrasound or whether you need to go elsewhere.
Useful questions to ask at your appointment
- What do you think is causing the problem, and what tests are needed before starting the medicine?
- Is a pregnancy test needed before starting?
- When do I start the medicine relative to the first day of my period, when do I stop it, and how long does the plan last?
- What side effects should I expect, and when should I contact you or go to the emergency room?
- Do any medicines or herbs I use interact with it?
Bring your cycle records, a list of your medicines, and the results of any previous ultrasounds or tests. This information helps in making the decision best suited to your situation.
Frequently asked questions
Can I buy Duphaston and take it without a prescription to bring on my period?
This is not recommended. A late period may be caused by pregnancy, a hormonal disorder, or other causes, and pregnancy must be ruled out first. Period bleeding should also not be stopped or induced before its cause is known. Consult a gynecologist to determine whether the medicine is suitable for you and what the correct schedule is.
Does Duphaston cause weight gain?
According to the ClinicsJo drug guide, Duphaston does not cause significant weight gain, contrary to common belief. Some women may feel bloating or breast tenderness, but this is not a real increase in weight. If you notice a significant change in your weight during treatment, tell your doctor so she can look for another cause.
What should I do if I get spotting while using Duphaston?
Spotting between periods may occur at the start of use and is a known side effect. Tell your doctor if it continues, as the schedule may need adjustment. Do not stop the medicine or change the dose on your own, because the stop dates are part of the treatment. If you are pregnant and have bleeding with severe pain, go to the emergency room immediately.
Should I stop Duphaston when the ultrasound shows the pregnancy is healthy?
Do not stop it on your own. The doctor sets a plan that specifies the week when medicine support ends, based on your condition and your history with pregnancy. Stopping early without instructions may disrupt the treatment plan. If you have questions or concerns, contact your doctor and ask her about the stop date.
Does Duphaston interact with other medicines or herbs?
Interactions are few. Enzyme inducers such as rifampicin and carbamazepine, and St John's wort, may reduce its effect, and there is no significant conflict with common painkillers and antibiotics. Tell your doctor and pharmacist about all the medicines, supplements, and herbs you take before starting so that the treatment's effect is not affected.
Is Duphaston safe in pregnancy?
Duphaston is classified in the drug guide as Category B in pregnancy, and it is prescribed to support pregnancy within documented protocols. However, this does not mean it can be used without a prescription. A gynecologist determines the need for it, the dose, and the duration of use, and monitors the pregnancy with ultrasound. Any bleeding with severe pain requires emergency care.
Sources and references
- Heavy periods — NHS (UK National Health Service). Accessed: 2026-10-26.
- Miscarriage — NHS (UK National Health Service). Accessed: 2026-10-26.
- Menstruation | Period — MedlinePlus — U.S. National Library of Medicine. Accessed: 2026-10-26.