NOTE: Depending on the supplier/strength selected, the products shipped may have different packaging.

Why is Antagon prescribed?

Antagon is used to manage hormone responses in women receiving treatment for infertility.

What does it do?

Antagon is a medication classified as a gonadotropin-releasing hormone (GnRH) antagonist. It works by blocking the production of luteinizing hormone (LH), which is responsible for triggering ovulation. By preventing LH production, ganirelix stops ovulation, allowing your healthcare provider to control the timing of ovulation for proper fertility treatment.

How should I take it?

This medication is injected under the skin and is typically administered by a healthcare professional in a hospital or clinic.

If you are receiving this medication at home, you will be instructed on how to prepare and administer it. Follow the instructions carefully. Take the medication at consistent intervals and do not take it more frequently than prescribed.

How should I take it?

Make sure not to miss a dose. If you do miss one, contact your doctor or healthcare provider for guidance.

What are the special precautions before taking Antagon?

Make sure to visit your doctor or healthcare provider for regular check-ups and discuss any concerns before starting this medication.

Your doctor needs to know if you have any of the following conditions:

• Allergies or unusual reactions to ganirelix, mannitol, latex, other medications, foods, dyes, or preservatives
• Kidney disease
• Liver disease
• Pregnant or breastfeeding

Your healthcare provider will monitor your hormone levels through blood tests and may use an ultrasound to assess how you’re responding to the treatment. It’s important to keep all scheduled testing appointments, as the timing of these tests in relation to your medication may be crucial.

If you think you might be pregnant, stop taking this medicine immediately and contact your doctor or healthcare provider.

Does it have any side effects?

Seek emergency medical help if you experience signs of an allergic reaction, such as difficulty breathing, hives, or swelling of your lips, tongue, face, or throat.

Common side effects may include:
• OHSS
• Stomach pain
• Headache
• Vaginal bleeding

Some women taking ganirelix may develop ovarian hyperstimulation syndrome (OHSS), which can be life-threatening. Contact your doctor immediately if you notice symptoms of OHSS, such as:

• Bloating, nausea, stomach pain, vomiting, or diarrhea
• Rapid weight gain, especially in the face and abdomen
• Little or no urination
• Pain while breathing, rapid heartbeat, or shortness of breath (especially when lying down)
This is not a complete list of side effects, and others may occur. Contact your doctor for advice if you experience any side effects.
Is it safe to take it with another drug?
Do not take this medication with the following:
• Chasteberry

This medication may also interact with the following:

• Herbal or dietary supplements, such as black cohosh or DHEA

This list may not cover all potential interactions. Provide your healthcare provider with a complete list of all medications, herbs, over-the-counter drugs, or dietary supplements you are taking. Also inform them if you drink alcohol as some of these may interact with your medication.

How should I store it?
Store the medication in a tightly closed container at room temperature, away from heat, moisture, and direct light. Do not freeze. Keep it out of the reach of children.
What action should I take in case of overdose?
There have been no reports of over dosage with Ganirelix Acetate Injection in humans.
Is it safe for pregnant or breastfeeding women?

Pregnancy: Ganirelix can harm an unborn baby and should not be used during pregnancy. It is safe for use in fertility treatments, but you should inform your healthcare provider if you become pregnant while using Ganirelix.

Breastfeeding: It is unclear whether Ganirelix passes into breast milk, so it should not be used while breastfeeding. Let your healthcare provider know if you are breastfeeding or plan to breastfeed.

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