Package Leaflet: Information for the User
SEIDIGESTAN 100 mg Soft Capsules
Progesterone
Read all of this leaflet carefully before you start taking this medicine because it contains important information for you.
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Seidigestan belongs to the group of medicines called progestogens and contains natural progesterone.
Seidigestan is used for disorders related to a progesterone deficiency, also in hormone replacement therapy for menopause, to resolve some fertility problems, and for the prevention of certain types of preterm labor and abortion.
Do not takeSeidigestan
Warnings and precautions
Using Seidigestan with other medicines:
Tell your doctor or pharmacist if you are using or have recently used or might use any other medicines, including those obtained without a prescription.
Taking Seidigestan with food and drinks:
The ingestion of food after taking the capsules increases their absorption, so it is recommended to take the capsules at the same time, outside of meals, avoiding variations in intake from one day to another.
Pregnancy and breastfeeding
If you are pregnant or breastfeeding, think you might be pregnant, or plan to become pregnant, consult your doctor or pharmacist before using this medicine.
Progesterone is the hormone that increases during pregnancy, so its administration during this period does not produce adverse effects.
Progesterone is eliminated in breast milk, so its administration during the breastfeeding period is not advisable.
Driving and using machines:
Given that there is a risk of drowsiness and/or vertigo sensations related to the use of progesterone orally, during treatment, activities that require a special state of alertness, such as driving vehicles or handling dangerous machinery, should not be performed.
Follow exactly the administration instructions of Seidigestan 100 mg as indicated by your doctor. Consult your doctor or pharmacist if you have doubts. Remember to take your medicine.
Your doctor will indicate the duration of your treatment with Seidigestan. Do not stop the treatment before the indicated time.
The dose to be administered should be established according to the hormonal plasma levels of each patient and will vary according to the indications.
The recommended dose is:
Orally:
Take the capsules with the help of a glass of water outside of meals.
The average recommended dose is 200 to 300 mg per day (i.e., 200 mg at night before bedtime or 100 mg in the morning and 200 mg at night before bedtime).
Vaginally:
Insert the capsules into the vagina deeply, pushing them with your finger.
The dose can range from 200 mg to 600 mg per day.
If you take more Seidigestan than you should
Consult your doctor or pharmacist immediately or go to the nearest hospital. In case of overdose or massive ingestion, various effects such as menstrual disorders, including amenorrhea (disappearance of menstruation), and also sedation (drowsiness) and liver alterations may occur.
In case of overdose or accidental ingestion, consult your doctor or pharmacist immediately or call the Toxicological Information Service, phone (91) 562 04 20, indicating the medicine and the amount ingested.
If you forget to take Seidigestan
Do not take a double dose to make up for the forgotten doses.
Like all medicines, Seidigestan can cause side effects, although not everybody gets them. The most common adverse reactions are:
Orally:
If you think any of the side effects you are experiencing is serious or if you notice any side effects not mentioned in this leaflet, tell your doctor or pharmacist.
No special storage conditions are required.
Keep out of the sight and reach of children.
Do not use Seidigestan after the expiry date stated on the carton after CAD. The expiry date is the last day of the month indicated.
Medicines should not be disposed of via wastewater or household waste. Place the packaging and any unused medicines in the SIGRE collection point at your pharmacy. If you are unsure, ask your pharmacist how to dispose of the packaging and any unused medicines. This will help protect the environment.
Composition of Seidigestan 100 mg capsules
Appearance of the product and contents of the pack
Spherical soft gelatin capsules. They are presented in boxes containing 30 capsules (2 blisters) or 60 capsules (4 blisters).
Marketing authorization holder and manufacturer
SEID, S.A.
Carretera de Sabadell a Granollers, Km. 15
08185 - Lliçà de Vall (Barcelona)
Date of last revision of this leaflet: October 2022
Detailed and updated information on this medicine is available on the website of the Spanish Agency for Medicines and Health Products (AEMPS) http://www.aemps.gob.es/.
The average price of SEIDIGESTAN 100 mg soft capsules in October, 2025 is around 5.81 EUR. Prices may vary depending on the region, pharmacy, and whether a prescription is required. Always check with a local pharmacy or online source for the most accurate information.