Susten SR 300 mg (Progesterone) Tablet

Introduction Susten SR 300 mg

Susten SR 300 mg (Progesterone) is a sustained-release form of progesterone, a hormone the body naturally makes, especially after ovulation and during pregnancy.

When progesterone levels are low or need support for medical reasons, clinicians may prescribe it to help stabilize the uterine lining and support a treatment protocol.

Because this is an SR (sustained-release) product, it releases progesterone more gradually than immediate-release options. Some people prefer that approach when trying to avoid peaks and dips that can come with shorter-acting doses.

The right choice depends on your diagnosis, symptoms, and your clinician’s approach to structuring your hormone plan.

What Susten SR 300 mg is commonly prescribed for

Your prescriber may recommend progesterone for several reasons. The exact use can vary a lot person to person, so it helps to ask what the goal is in your specific plan.

Common medical uses for progesterone products include support in hormone therapy, cycle-related progesterone deficiency, and fertility treatment protocols.

• Progesterone support in hormone therapy: Often used to protect the uterine lining when estrogen is part of the plan (for people who still have a uterus).
• Cycle-related progesterone deficiency: In some cases of irregular cycles or luteal phase concerns, progesterone may be used on specific days of the cycle.
• Fertility treatment protocols: Progesterone is frequently included in certain fertility or assisted reproduction plans, based on clinic preference and patient needs.

If you are not sure why you were prescribed progesterone, it is worth clarifying with your clinician, as dosing schedules can vary depending on the reason.

How it works in the body

Progesterone helps prepare and maintain the uterine lining (endometrium). When progesterone is adequate, the lining is more stable. When progesterone drops, that change can trigger bleeding in a normal cycle.

In prescribed therapy, progesterone is used to create a predictable hormone effect based on the treatment goal.

Typical dosing notes (follow your prescription)

Susten SR 300 mg (Progesterone) is a higher-strength capsule, so it is usually chosen when a clinician specifically wants a 300 mg dose in an SR format.

Some people are instructed to take it in the evening because progesterone can make you feel sleepy or a bit slowed down.

Do not change the dose, timing, or duration on your own, especially if it is part of a fertility or hormone therapy plan.

Possible side effects

Side effects vary by person and dose. Some effects are more common early on or when the dose is increased. Possible side effects can include:

• Sleepiness, dizziness, fatigue
• Headache
• Breast tenderness
• Bloating, mild stomach discomfort
• Mood changes
• Spotting or changes in bleeding patterns (depending on why it is used)

Call your prescriber promptly if you notice severe or unusual symptoms, or if you have signs of an allergic reaction.

Who should be extra cautious?

Progesterone is not appropriate for everyone. Make sure your prescriber is aware of your full medical history.

Extra caution is generally needed if you have a history of blood clots, stroke, certain hormone-sensitive cancers, unexplained vaginal bleeding, or significant liver disease.

This is not a complete list, so rely on your clinician’s screening.

Available Strengths

Susten SR 300 mg (Progesterone) may also be found in other strengths, depending on the manufacturer and supply. Common progesterone capsule strengths seen in the market include:

• Progesterone 100 mg
• Progesterone 200 mg
• Susten 300 mg (Progesterone)
• Progesterone 300 mg (SR)
• Susten 400 mg (Progesterone)
• Susten SR 400 mg (Progesterone) Tablet
• Susten VT 200 Mg (Progesterone) Tablet
• Susten 100 mg (Progesterone)

Availability can vary, and not every strength is available in sustained-release form.

Substitute Options

Only switch progesterone products with prescriber guidance, especially if the route or release type changes.

Common substitutes or alternatives include:

• Susten 8% Vaginal gel (Progesterone)
• Micronized progesterone capsules (generic progesterone)
• Prometrium (micronized progesterone) (brand availability may vary)
• Utrogestan (micronized progesterone) (availability varies by country/market)
• Vaginal progesterone options used in some fertility protocols
• Progestins such as medroxyprogesterone acetate (Provera) are an alternative in specific cases (not the same molecule as progesterone, and not interchangeable without clinical direction)

The best substitute depends on why progesterone is being used, your side-effect profile, and whether sustained-release is important for your plan.

FAQs

1. Should I take Susten SR 300 mg with food?

Follow your prescriber’s directions. If your stomach feels unsettled, ask your clinician or pharmacist whether taking it with a small meal is appropriate for you.

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

It depends on your treatment plan and timing. Contact your prescriber for instructions, especially if you are using it for cycle scheduling or fertility support.

3. Can I drink alcohol while taking progesterone?

Alcohol can worsen sleepiness or dizziness for some people. Ask your clinician what is reasonable for your situation.

4. How should I store this medication?

Store it at room temperature away from heat, moisture, and direct light. Keep it out of reach of children and pets. Check the package label for any special storage directions.

5. Can I take Susten SR 300 mg with antidepressants or thyroid medication?

Sometimes yes, but interactions and symptom overlap are possible. Share your full medication list with your prescriber and pharmacist so they can screen for issues.