Cetrorelix vs. Ganirelix for Fertility: Important Differences and Potential Risks.

Cetrorelix

(Cetrotide)

Ganirelix

(Fyremadel)

Summary for Cetrorelix

Prescription only

Cetrorelix (Cetrotide) is an injectable fertility medication that's used during in vitro fertilization (IVF). It belongs to a drug class called GnRH antagonists. It helps prevent your body from releasing eggs too early before egg retrieval in the IVF process. You typically inject a dose of the medication under the skin once a day on certain days of the IVF cycle. Potential side effects include ovarian hyperstimulation syndrome, nausea, and headache.

Indications for Cetrorelix

Infertility (having trouble becoming pregnant)

Pros and Cons for Cetrorelix

Pros

Can be given at home
Given once a day on certain days of the IVF process
Usually well-tolerated with few side effects

Cons

Must prepare the injection each time (must mix and draw up into a syringe)
Can cause redness or itching around the injection site
Not safe if you have severe kidney problems or a mannitol allergy

Common Side Effects for Cetrorelix

Ovarian hyperstimulation syndrome (4%)

Warnings for Cetrorelix

Allergic reactions
Not safe to use while pregnant

Summary for Ganirelix

Prescription only

Ganirelix (Fyremadel) is an injection that's given on certain days during the in vitro fertilization (IVF) process for people who have a hard time becoming pregnant. This medication is a gonadotropin-releasing hormone (GnRH) antagonist. It prevents your eggs from being released too soon before the egg retrieval step. Ganirelix (Fyremadel) is injected under the skin once daily during a certain number of days of the IVF cycle. Potential side effects include stomach pain, headache, and redness and swelling at the injection site.

Indications for Ganirelix

Infertility (having trouble becoming pregnant)

Pros and Cons for Ganirelix

Pros

Can give yourself injections at home
Generally well-tolerated
Comes as a ready-to-use prefilled syringe

Cons

Must be injected under the skin
Might need multiple office visits for ultrasounds to see when you're ready for the next step in your fertility treatment
Some products contain latex, so it's not the best option for those with a latex allergy