Prescription requiredHormonal (Progestin) / Gynaecological

Regestrone CR 10 Tablet — Side Effects & Warnings

Known side effects of Regestrone CR 10 Tablet include Nausea, headache, breast tenderness, bloating, abdominal pain, dizziness, mood changes, spotting/breakthrough bleeding, changes in menstrual flow, weight gain, acne. Not everyone experiences these side effects.

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated June 2026

Common Side Effects

Nausea
headache
breast tenderness
bloating
abdominal pain
dizziness
mood changes
spotting/breakthrough bleeding
changes in menstrual flow
weight gain
acne

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Schedule H: use only on prescription. Rule out pregnancy before starting; not for use in known/suspected pregnancy. Use with caution in liver disease, history of jaundice, depression, diabetes, hypertension, migraine, asthma, epilepsy. Seek urgent care for symptoms of blood clots (leg swelling/pain, chest pain, sudden breathlessness), severe headache/vision changes, or jaundice. May cause irregular bleeding, especially initially. Not a contraceptive; use additional contraception if needed as advised. Avoid in active thromboembolic disorders, severe liver disease, hormone-dependent malignancy, undiagnosed vaginal bleeding (as per clinician assessment).

Drug Interactions

Regestrone CR 10 Tablet may interact with the following:

Enzyme inducers may reduce effect: rifampicin/rifabutin
phenytoin
carbamazepine
phenobarbital/primidone
topiramate
some antiretrovirals
St John’s wort. May affect anticoagulant control (warfarin) and antidiabetic dose requirements. Consult doctor/pharmacist for interaction check.

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Not recommended (contraindicated in pregnancy); consult doctor

Alcohol Interaction

Use with caution (alcohol may worsen side effects like dizziness/nausea); consult doctor

Habit Forming

Storage

Store below 25°C in a cool, dry place. Protect from light and moisture. Keep out of reach of children.

Regestrone CR 10 Tablet — Safety Summary

Composition: Norethisterone 10 mg (controlled release) tablet
Prescription: Required (Rx)
Pregnancy: Not recommended (contraindicated in pregnancy); consult doctor
Alcohol: Use with caution (alcohol may worsen side effects like dizziness/nausea); consult doctor
Habit forming: No

Regestrone CR 10 Tablet — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.

Regestrone CR 10 Tablet — Side Effects & Warnings

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated June 2026