Diethylstilbestrol Tablets: Advanced Prostate Cancer Guide
Comprehensive guide to Diethylstilbestrol tablets for prostate cancer treatment, usage, side effects, and precautions.
About Diethylstilbestrol Tablets
Diethylstilbestrol (DES) is a synthetic non-steroidal estrogen hormone specifically formulated for treating advanced prostate cancer in men. It is prescribed when patients have not responded to other forms of drug or surgical castration, and alternative treatments are unsuitable. By mimicking estrogen, DES suppresses testosterone production, which fuels prostate cancer growth.
Historically, DES was used for various purposes, including menopausal disorders and even as a growth promoter in animals, but its primary modern application is in oncology for hormone-sensitive cancers like advanced prostate cancer. In men, it works by binding to estrogen receptors in target cells, including the prostate, leading to reduced follicle-stimulating hormone (FSH) and overall suppression of androgen activity.
This medication comes as 1 mg film-coated tablets, designed for oral administration. Patients should understand its targeted use to manage expectations and adhere to prescribed regimens for optimal efficacy.
Key Facts
- Type: Synthetic non-steroidal estrogen.
- Primary Use: Advanced prostate cancer in castration-resistant cases.
- Dosage Form: 1 mg film-coated tablets.
- Administration: Oral, swallowed whole with water.
- Not for Children: Strictly prohibited in pediatric use.
What you need to know before taking Diethylstilbestrol
Before starting Diethylstilbestrol, consult your doctor about your medical history to avoid contraindications and manage risks. This medication is not suitable for everyone, and certain conditions require close monitoring.
Do not take if:
- You are allergic to diethylstilbestrol or any ingredients (e.g., lactose, sunset yellow coloring).
- You have active or past thrombosis (blood clots).
- You have sickle cell anemia.
- You have porphyria (enzyme deficiency leading to porphyrin buildup).
Warnings and Precautions
Inform your doctor if you have any of the following, as they may influence treatment:
- Kidney problems.
- Liver issues or jaundice history.
- Mild hypertension.
- Diabetes (may raise blood sugar levels).
- Epilepsy.
- Migraine.
- Depression.
- Contact lens use (may affect tolerance).
- Gallstones.
- Thyroid disorders (can interfere with tests).
Doctors may prescribe low-dose aspirin to prevent clots and consider breast bud radiation to minimize gynecomastia (breast enlargement), a common side effect.
Other Medicines and Interactions
Diethylstilbestrol can interact with various drugs. Always disclose your full medication list:
- Diuretics or water tablets.
- High blood pressure medications.
- Anticoagulants (blood thinners).
- Diabetes treatments (monitor blood sugar).
- Antiepileptics or migraine drugs.
Lactose-intolerant patients should note the small lactose content; sunset yellow may trigger allergies.
Pregnancy, Breast-feeding, and Handling
DES is not for women, but pregnant individuals must not handle tablets without gloves due to teratogenic risks. Historically linked to cancer in DES-exposed offspring (1940-1971 usage in pregnancy).
How to take Diethylstilbestrol
Follow your doctor’s instructions precisely. Swallow tablets whole with water, preferably at the same time daily for consistent levels.
Dosage
| Condition | Adults/Elderly | Children |
|---|---|---|
| Prostate Cancer | 1-3 tablets (1-3 mg) per day | Not recommended |
Dosage may adjust based on response; initial higher doses taper to 1 mg/day maintenance.
Missed Dose
Take as soon as remembered unless near next dose. Never double up.
Overdose
Seek immediate medical help. Provide details on tablets taken.
Stopping Treatment
Do not discontinue without consulting your doctor, even if symptoms improve.
Possible Side Effects
Side effects vary; not all patients experience them. Report severe issues immediately.
Serious Side Effects (Stop and Seek Help)
- Allergic reactions: swelling, rash, breathing difficulty.
- Blood clots: leg/arm pain, swelling, redness, breathlessness.
Common Side Effects
- Nausea (mild; anti-emetics available).
- Fatigue (pace activities, stay active).
- Hypertension (regular checks).
- Raised blood sugar (thirst, frequent urination; monitor if diabetic).
- Gynecomastia, impotence, reduced libido.
- Fluid retention, weight gain.
Less Common
- Headaches, dizziness.
- Liver function changes.
- Breast tenderness.
Blood clot risk is elevated; symptoms include throbbing pain or sudden breathlessness—call emergency services.
How to store Diethylstilbestrol
- Store below 25°C in original packaging.
- Keep out of children’s reach.
- Do not use after expiry; return unused to pharmacy.
Contents of the Pack and Other Information
Each pack contains 28 tablets. Active: Diethylstilbestrol 1 mg. Excipients include lactose, sunset yellow. Manufactured by Teva UK.
Patient Tips for Managing Treatment
To optimize outcomes:
- Attend regular check-ups for blood pressure, sugar, and clot monitoring.
- Maintain a balanced diet and light exercise to combat fatigue.
- Avoid alcohol if liver issues present.
- Inform all healthcare providers of DES use.
Historical Context and Risks
DES gained notoriety for prenatal use (1940-1971), causing vaginal cancers in daughters and genital issues in sons. Today, restricted to specific cancer cases with informed consent.
Frequently Asked Questions (FAQs)
Q: Who is Diethylstilbestrol prescribed for?
A: Primarily men with advanced prostate cancer unresponsive to castration or other therapies.
Q: Can children take it?
A: No, strictly contraindicated in children.
Q: What if I miss a dose?
A: Take promptly unless near next dose; skip double-dosing.
Q: Does it cause blood clots?
A: Yes, increased risk; low-dose aspirin may be given preventively. Watch for symptoms.
Q: Is it safe with diabetes?
A: Monitor blood sugar closely; it can elevate levels.
Q: How does DES work?
A: As an estrogen agonist, it suppresses FSH and testosterone via receptor binding.
References
- Package Leaflet: Information for the User – Diethylstilbestrol 1 mg Film-Coated Tablets — Medicines.org.uk (EMC). 2023. https://www.medicines.org.uk/emc/files/pil.13401.pdf
- Diethylstilbestrol – Macmillan Cancer Support — Macmillan.org.uk. 2024-05-15. https://www.macmillan.org.uk/cancer-information-and-support/treatments-and-drugs/diethylstilbestrol
- Diethylstilbestrol: Uses, Interactions, Mechanism of Action — DrugBank. 2025-01-10. https://go.drugbank.com/drugs/DB00255
- Diethylstilbestrol (DES) Exposure and Cancer — National Cancer Institute (cancer.gov). 2023-08-22. https://www.cancer.gov/about-cancer/causes-prevention/risk/hormones/des-fact-sheet
- Patient Information Leaflet – Diethylstilbestrol — Teva UK. 2024. https://products.tevauk.com/media/download/49871
- DES Exposure: Questions and Answers — American Cancer Society. 2024-02-01. https://www.cancer.org/cancer/risk-prevention/medical-treatments/des-exposure.html
- Diethylstilbestrol (DES) – Davis’s Drug Guide — DrugGuide.com (F.A. Davis). 2025. https://www.drugguide.com/ddo/view/Davis-Drug-Guide/109116/all/diethylstilbestrol
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