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Are your periods irregular? Let's talk about Progesterone Injection

MBBS
Medically Reviewed by MBBS ✓ Medically Reviewed
📅 Updated: Jul 14, 2026 • ⏱ 6 min read • Editorial policy
Are your periods irregular? Let's talk about Progesterone Injection
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Do you often miss your period? Or do you not get it on time? This is actually a problem that many women in our country have. Today we are going to talk about an injection that doctors use as a treatment for such irregular periods. That is the Progesterone injection.

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Simply put, what is this Progesterone injection?

Progesterone is a very important hormone that is naturally produced in a woman's body. This hormone is especially important during pregnancy to maintain regular, regular menstrual cycles. So, sometimes when the levels of this hormone decrease in the body, menstruation can become irregular, late, or absent for months.

At such times, doctors use this progesterone injection to restore your monthly menstrual cycle by providing the body with the necessary progesterone levels from outside. To be precise, this is a medicine that belongs to the group of hormones called progestins.

Things you need to tell your doctor before taking this medicine

Before your doctor gives you this injection, it is very important to know your complete medical history. This is because some medical conditions can make using this medicine risky. Therefore, if you have any of the following conditions, be sure to tell your doctor about them.

  • If you have previously had a blood clot or stroke .
  • If you have or have had breast, cervical, or vaginal cancer .
  • If you have diabetes .
  • If you have heart disease .
  • If you have liver disease .
  • If you have recently had an abortion or miscarriage.
  • If you have unusual vaginal bleeding for which the exact cause is unknown.
  • If you have an allergic reaction to the progesterone hormone or any other medicine, food, or dye.
  • If you are pregnant or expecting a baby .
  • If you are a mother who is breastfeeding .

Telling the doctor this information without hiding it is very important for your safety.

How do you use this injection?

This injection is usually given into a muscle.This is often given in a hospital or clinic.

However, in some cases, your doctor may instruct you to give yourself this injection at home. If so, you will be given detailed instructions on how to do it correctly and how to prepare the syringe. Remember to take the medicine only at the prescribed intervals as directed by your doctor . Never take more than the prescribed amount.

What do you do with used needles?

This is very important. Never throw used needles and syringes in the trash . Doing so can be a serious danger to others. There is a special sharps container for them. If you don't have one, ask your doctor about how to get one.

What if the dose of medicine is increased or forgotten?

If you have even the slightest suspicion that you have taken too much of this medicine, go to the nearest hospital Emergency Department (ETU) immediately . Or you can call the National Poisons Information Centre at the Colombo National Hospital for advice.

If you forget to take a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next dose at the scheduled time. Never take a double dose.

Other drugs that may interact with this medicine (Drug Interactions)

Progesterone injections can interact with some other medications, so it's important to tell your doctor about all the medications you're taking.

Type of medicine Description
Never take this medicine with
Bosentan A medicine for pulmonary hypertension.
Tell your doctor, as this may interact with your medication.
Barbiturates Medications that make you sleepy or for seizures.
Carbamazepine, Phenytoin, Ethotoin Medications for seizures.
Ketoconazole An antifungal medicine.
Rifampin An antibiotic given for tuberculosis (TB).
Bexarotene A drug given for some types of cancer.

Remember, this list is not complete. It is very important to tell your doctor about any other medications, vitamins, herbal remedies, or supplements you are taking. Also, tell your doctor if you smoke or drink alcohol.

What side effects can be expected?

Like any medication, progesterone injections can cause side effects in some people. Some of these require immediate attention, while others are usually not serious.

Side effect Description
If you have these symptoms, inform your doctor as soon as possible.
Allergic reactionsSkin rash, itching, swelling of the face, lips, tongue.
Symptoms of a blood clot Leg pain, swelling, feeling hot, difficulty breathing, chest pain.
Symptoms of a stroke Sudden numbness or weakness in the face, arm, or leg, difficulty speaking, or walking.
Symptoms of liver damage Pain in the upper right side of the stomach, loss of appetite, yellowing of the skin or eyes, dark urine.
Changes in the breasts New lumps, redness, pain, and discharge from the nipple.
Vision changes Sudden eye pain, blurred vision, or loss of vision.
Mental changes The onset or worsening of depression.
These are usually not serious, but if they persist, tell your doctor.
Bloating Dizziness
Breast pain/tenderness Headache
SleepinessSwelling of hands, feet, and ankles
Spotting during menstruation Nausea

💡 Take-Home Message

  • Progesterone is a hormone injection given to treat conditions such as irregular menstruation.
  • Before taking this medication, it is essential to tell your doctor about your complete health history and other medications you are taking.
  • Never share this medicine with others. This is prescribed for you only.
  • If you notice any signs of a serious side effect, such as blood clots, stroke, or allergies, seek medical advice immediately.
  • Follow your doctor's instructions exactly regarding how to use the medicine, dosage, and how to dispose of used needles.
  • If you have any questions about this medicine, don't be afraid to discuss it with your doctor.
❓ FAQ

FAQ

Evidence-based clinical answers to common patient questions

What do you do with used needles?

This is very important. Never throw used needles and syringes in the trash . Doing so can be a serious danger to others. There is a special sharps container for them. If you don't have one, ask your doctor about how to get one.

What if the dose of medicine is increased or forgotten?

If you have even the slightest suspicion that you have taken too much of this medicine, go to the nearest hospital Emergency Department (ETU) immediately . Or you can call the National Poisons Information Centre at the Colombo National Hospital for advice.

If you forget to take a dose, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and take the next dose at the scheduled time. Never take a double dose.

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⚠️ Important: Medical articles and information on Nirogi Lanka are strictly for educational and awareness purposes and do not substitute professional medical advice, diagnosis, or treatment. Always consult a qualified physician for any medical concerns.