
A B Phylline Caps
Sun Pharma - Capsule - 15 S
Prescription required
Progesterone (Natural Micronized) (300mg)
Susten SR 300 Tablet is used for luteal phase support in infertility/ART (IVF/ICSI), progesterone supplementation in progesterone deficiency, support of early pregnancy in threatened/recurrent miscarriage due to luteal insufficiency, secondary amenorrhea (as prescribed).
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated September 2026
Medicines with the same active ingredient and strength as Susten SR 300 Tablet.
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Susten SR 300 Tablet
tablet - 10 Tablet
₹652
₹65.16 per tablet
ARISTO PHARMACEUTICALS PVT LTD · tablet - 300 mg - 10 S · Rx
₹609
₹60.94 per tablet
A substitute contains the same active ingredient (salt), in the same strength, as Susten SR 300 Tablet. The medicine inside is the same — the brand name, manufacturer and price are what differ.
All medicines sold in India, branded or generic, must meet the quality standards set by the national drug regulator (CDSCO). A lower price does not mean lower quality.
Please confirm with your doctor or pharmacist before switching brands — they will check that the strength and form match your prescription.
Susten SR 300 Tablet contains Progesterone (Natural Micronized) (300mg). It belongs to the Progestogen (natural progesterone) class of medicines.
Progesterone is a natural female hormone that prepares and maintains the uterine lining (endometrium) for implantation and pregnancy. It stabilizes the endometrium, reduces uterine contractions, and supports the luteal phase when endogenous progesterone is inadequate.
Oral sustained-release tablet; take exactly as prescribed, preferably at the same time each day. Usually taken after food and often at bedtime (may cause drowsiness/dizziness). Swallow whole; do not crush or chew. Duration and dose depend on indication (luteal support/pregnancy support/amenorrhea).
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you miss a dose of SustEN SR 300 Tablet, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule. Do not double the dose.
An overdose of this medicine may cause nausea, vomiting and withdrawal bleeding. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Susten SR are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Consult doctor (commonly prescribed for luteal support in pregnancy; use only on medical advice) |
|---|---|
| Breastfeeding | Breast feeding CAUTION |
| Alcohol | Use with caution (may increase dizziness/drowsiness) |
| Driving | Driving UNSAFE |
| Kidney | Kidney CONSULT YOUR DOCTOR |
| Liver | Liver CAUTION |
| Habit forming | No |
May cause sleepiness/dizziness—avoid driving or alcohol if affected. Use with caution in liver disease, history of depression, epilepsy/migraine, diabetes, asthma, kidney/heart disease or fluid retention. Seek urgent care for signs of blood clot (leg pain/swelling, chest pain, breathlessness), severe headache/vision changes, jaundice, or heavy vaginal bleeding. Not for use in known/suspected breast or genital cancers, unexplained vaginal bleeding, active thromboembolic disorders, or severe liver disease unless specialist directs.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Not for people with a history of blood clots, certain hormone-sensitive cancers, or active liver disease. Several are contraindicated in pregnancy.
CYP3A4 inducers may reduce effect (rifampicin, rifabutin, carbamazepine, phenytoin, phenobarbital, primidone, St John’s wort); CYP3A4 inhibitors may increase levels (ketoconazole/itraconazole, clarithromycin/erythromycin, ritonavir); additive sedation with alcohol, benzodiazepines, opioids, antihistamines; may affect glycemic control in diabetics (monitor).
Store below 25°C, protected from moisture and light. Keep in original blister pack and out of reach of children.
SustEN SR 300 Tablet may also be used in the treatment of problems related to the menstrual period, such as amenorrhea (absence of periods). It also helps in the maintenance of pregnancy in women who are at higher risk of miscarriage. It should be taken with food. It may cause sleepiness or drowsiness. If this happens to you, do not drive or use machinery.
Medicines with the same active ingredient (Progesterone (Natural Micronized) (300mg)). Ask your doctor or pharmacist before switching brands.
| Medicine | Pack | Price | vs Susten SR 300 Tablet |
|---|---|---|---|
| Susten 300 mg CapsuleSUN PHARMA | capsule · 10`S | ₹553 | 15% cheaper |
| Profine SR 300 mg TabletARISTO PHARMACEUTICALS PVT LTD | tablet · 10`S | ₹609 | 6% cheaper |
| Gestofit 300 SR TabletALEMBIC PHARMA | tablet · 10`S | ₹680 | 4% more |
| Lupigest SR 300 mg TabletLUPIN LAB | tablet · 10`S | ₹835 | 28% more |

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Prescription required
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Prescription required
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The information on Susten SR 300 Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.