Susten 100 mg (Progesterone)

Intro About Susten 100 mg (Progesterone)

Susten 100 mg (Progesterone) is a prescription medicine that provides progesterone, a hormone the body naturally makes and uses to regulate the menstrual cycle and support the uterine lining.

When progesterone levels are low or out of balance, some people develop irregular bleeding, missed periods, or problems related to estrogen therapy that is not balanced with a progestin.

This product is one way clinicians replace progesterone in a controlled, measurable dose.

What this medicine is used for

Progesterone products like Susten 100 mg are prescribed for specific hormone-related situations. Your clinician may recommend progesterone to:

• Help manage secondary amenorrhea (missed periods in someone who previously had cycles) when it is related to hormonal imbalance.
• Treat certain types of abnormal uterine bleeding that are linked to hormone imbalance, after other causes have been evaluated.
• Provide endometrial protection for people taking estrogen therapy who have a uterus, since estrogen alone can increase the risk of endometrial overgrowth in some patients.

In some practices, progesterone is also used in fertility care or early pregnancy support plans. Those uses depend heavily on the diagnosis, route of administration, and the protocol your clinician follows.

If you are using progesterone for fertility-related care, your instructions may look very different from standard hormone therapy dosing.

How progesterone works in the body

Progesterone helps stabilize the lining of the uterus (the endometrium). In a typical cycle, progesterone rises after ovulation and signals the body to maintain the uterine lining.

If pregnancy does not occur, progesterone falls and a period starts. When the body does not make enough progesterone, the lining may become unstable, which can contribute to irregular bleeding patterns.

When progesterone is used alongside estrogen therapy, it helps counterbalance estrogen’s effect on the uterine lining.

What taking it can feel like

Many people notice that progesterone can cause drowsiness or dizziness, especially when starting or adjusting the dose. Some clinicians recommend taking it in the evening if drowsiness is an issue, but you should follow the schedule you were given. Do not drive or do tasks that require full alertness until you know how it affects you.

Common side effects

Not everyone gets side effects, but some reported effects with progesterone capsules include:

• Sleepiness or fatigue
• Dizziness
• Headache
• Breast tenderness
• Bloating or stomach discomfort
• Mood changes
• Spotting or changes in bleeding pattern

Contact a clinician promptly if you have concerning symptoms, especially unusual vaginal bleeding, severe headache, vision changes, chest pain, shortness of breath, swelling in one leg, or signs of a serious allergic reaction.

Important safety notes to discuss with your clinician

Progesterone is not appropriate for everyone. Make sure your prescriber knows your full history, including any past blood clots, stroke, liver disease, hormone-sensitive cancers, or unexplained vaginal bleeding.

Also, review the ingredient list. Some progesterone softgel formulations may contain certain oils, such as peanut or soybean oil (for example, in some brands).

If you have food allergies, do not assume all formulations are the same. Ask a pharmacist to confirm the inactive ingredients for your specific product.

Practical expectations during treatment

Hormone therapy is rarely one-size-fits-all. Your dose and schedule may be based on your symptoms, your cycle history, whether you are using estrogen therapy, and how you respond.

It is common for clinicians to reassess symptoms and bleeding patterns and adjust the plan over time. If your bleeding becomes heavier, more frequent, or unpredictable, it deserves a check-in rather than waiting it out.

This information supports, but does not replace, guidance from your licensed clinician who knows your medical history.

Other Strengths (Dosages)

Susten is commonly available in multiple strengths, depending on supplier and market availability, such as:

• Susten 100 mg
• Susten 200 mg
• Susten 300 mg
• Susten 400 mg (Progesterone)

If you are switched between strengths, your dosing schedule may change. Confirm the exact directions each time you refill.

Substitute Options

If your clinician wants the same active ingredient (progesterone) but a different brand or form, they may consider options such as:

• Micronized progesterone capsules (generic progesterone)
• Prometrium (micronized progesterone capsule)
• Utrogestan (micronized progesterone, availability varies by country)
• Progesterone vaginal products (brand and form vary, used in specific protocols)
  Susten 8% Vaginal gel (Progesterone)
• Progesterone in oil injections (typically used in certain fertility protocols)
  Susten Injection (Progesterone)
  Susten 200 mg Injection (Progesterone)
  Susten 100 mg Injection (Progesterone)
  Gestoford 200 mg (Progesterone)
  Gestone 200 mg (Progesterone)

These are not automatically interchangeable. Route (oral vs vaginal vs injection), dose, and clinical goal matter.

FAQs

1. What should I do if I miss a dose?

Take it as soon as you remember if it is not close to your next scheduled dose. If it is close, skip the missed dose and return to your regular schedule. Do not double up unless your prescriber specifically tells you to.

2. Can I drink alcohol while taking progesterone?

Alcohol can increase sleepiness and dizziness, which can already occur with progesterone. If you drink, consider limiting alcohol and avoid driving if you feel sedated. Ask your clinician if alcohol is safe for your specific situation.

3. How should I store Susten softgel capsules?

Store at room temperature, away from heat, moisture, and direct light. Keep capsules in their original packaging until use. Do not use capsules that look melted, leaking, or damaged.

4. Are there medications or supplements that can interfere with progesterone?

Yes. Some medicines and herbal supplements can affect hormone metabolism. Share a full list of prescriptions, over-the-counter products, and supplements with your clinician and pharmacist so they can screen for interactions.

5. Can I open, crush, or chew the softgel capsule?

No. Soft gelatin capsules are designed to be swallowed whole. Altering them can change how the dose is delivered and may irritate your mouth or throat. If swallowing is difficult, ask your clinician about alternatives.