Grystella (Desogestrel)

Grystella is indicated for the prevention of pregnancy in women of childbearing potential.

• Primary use as a progestin‑only oral contraceptive taken daily to prevent ovulation and achieve reliable birth control.
• Suitable for women who have contraindications to estrogen, such as a history of thromboembolic disorders or migraine with aura.
• Can be incorporated into a standard 28‑day cycle schedule, with a tablet taken each day without a hormone‑free interval.
• May be prescribed to help regulate menstrual bleeding patterns when hormonal contraception is otherwise indicated.
• Provides a reversible, user‑controlled method of contraception that does not require injection or device placement.

Like other hormonal contraceptives, Grystella may cause side effects that vary in frequency and severity.

Common

• Irregular vaginal bleeding or spotting, especially during the first few months.
• Headache or mild migraine.
• Nausea or mild gastrointestinal discomfort.
• Breast tenderness or mild enlargement.

Serious

• Deep vein thrombosis or pulmonary embolism (rare but serious).
• Severe allergic reaction such as rash, swelling, or difficulty breathing.
• Liver dysfunction indicated by jaundice or abnormal liver tests.

Before prescribing Grystella, healthcare providers assess several precautionary factors to ensure safe use.

• History of thromboembolic disease, stroke, or myocardial infarction.
• Known or suspected pregnancy, as the medication is not intended for use during pregnancy.
• Unexplained vaginal bleeding or active liver disease.
• Severe hypertension or uncontrolled high blood pressure.
• Smoking in women over 35 years of age.
• Breast cancer or estrogen‑sensitive tumors.
• Use of certain medications that may reduce contraceptive effectiveness.

Grystella can interact with other medicines, affecting its efficacy or safety profile.

Avoid

• Concurrent use with strong enzyme inducers such as rifampicin, carbamazepine, phenytoin, or St. John’s wort, which may markedly reduce contraceptive effectiveness.
• Use with medications known to increase the risk of thrombosis, such as hormonal replacement therapy containing estrogen.

Use with caution

• Antifungal agents like ketoconazole that may increase desogestrel levels.
• Certain antiretroviral drugs (e.g., protease inhibitors) that can alter hormone metabolism.
• Herbal supplements that affect liver enzymes, including ginseng or green tea extracts.
• Medications that cause nausea or vomiting, which may impair absorption of the tablet.