Emgality 

(Galcanezumab): Uses, Side Effects, Warnings & More

Emgality (galcanezumab) is a medication used to prevent migraine headaches in adults. It is a humanized monoclonal antibody that targets calcitonin gene-related peptide (CGRP), a molecule involved in the transmission of pain and inflammation.

Overview: Emgality is a prescription medication administered via injection, typically given once a month. It is designed to prevent migraine headaches, reducing the frequency and severity of attacks. This medication works by blocking the action of CGRP, which is involved in the development of migraine pain. By targeting CGRP, this medication helps to reduce the number of migraine days and improve quality of life for individuals suffering from this debilitating condition.

What Is Emgality?

Emgality (galcanezumab-gnlm) is a prescription injectable medication classified as a calcitonin gene-related peptide (CGRP) antagonist. It was approved by the U.S. Food and Drug Administration (FDA) in 2018 for the preventive treatment of migraine in adults. In 2019, it was also approved for the treatment of episodic cluster headaches.

Galcanezumab works by blocking the activity of CGRP, a neuropeptide involved in the transmission of pain and inflammation during migraines and cluster headache attacks. By targeting this peptide, This medication helps to reduce the frequency and intensity of headache episodes.

How does Emgality work (mechanism of action)?

To understand how Emgality works, it’s important to know what happens during a migraine or cluster headache attack.

• During an attack, the trigeminal nerve in the brain releases CGRP.
• CGRP dilates blood vessels and increases inflammation.
• This contributes to the severe pain and other symptoms of migraines and cluster headaches.

This medication binds to the CGRP molecule, preventing it from attaching to its receptors. This inhibits the cascade of inflammation and vascular changes, reducing migraine frequency and the severity of attacks.

What is Emgality used for?

Emgality is FDA-approved for the following:

Migraine Prevention in Adults

This medication is used as a preventive treatment for episodic and chronic migraines. Patients typically inject the medication once a month. Clinical studies have shown that Em-gality can significantly reduce the number of monthly migraine days (MMDs).

• Episodic Migraine: Fewer than 15 headache days per month.
• Chronic Migraine: 15 or more headache days per month, with at least 8 being migraine days.

Episodic Cluster Headaches

Emgality is also indicated for the treatment of episodic cluster headaches, which are severe, one-sided headaches occurring in cyclical patterns. This medication is the first and only FDA-approved treatment specifically for this condition.

Note: This medication is not approved for the treatment of acute migraine attacks or chronic tension headaches.

Dosage and Administration

Emgality is supplied in a pre-filled syringe or autoinjector.

Migraine Prophylaxis:

• Initial dose: 240 mg (administered as two consecutive 120 mg injections)
• Maintenance dose: 120 mg once a month

Cluster Headache Treatment:

• Dose: 300 mg (administered as three consecutive 100 mg injections) monthly during the cluster period

Administration:

• Em-gality is a subcutaneous injection.
• Patients can self-inject the medication in areas like the thigh, abdomen, or upper arm.
• Always rotate the injection site and follow instructions provided in the packaging.

Common Side Effects

As with any medication, Emgality may cause side effects. Most are mild and transient, but serious reactions can occur in rare cases.

Common Side Effects:

• Injection site reactions (pain, redness, swelling)
• Constipation
• Dizziness
• Allergic reactions (mild rash or itching)

Less Common Side Effects:

• Muscle cramps
• Nasal congestion
• Tiredness or fatigue

Serious Reactions (Seek Medical Attention):

• Hypersensitivity reactions, including:
  • Trouble breathing
  • Swelling of face, tongue, or throat
  • Severe rash or hives
• Severe constipation that doesn’t improve

Though rare, anaphylaxis (a life-threatening allergic reaction) has been reported.

Warnings and Precautions

Before using Emgality, patients should be aware of the following:

Allergic Reactions

This medication may cause allergic reactions, including serious hypersensitivity. If you have a history of severe allergic reactions to medications, consult your healthcare provider before starting Em-gality.

Constipation

Some patients have reported severe constipation, sometimes requiring hospitalization. Monitor your bowel habits and inform your doctor if constipation becomes persistent or painful.

Pregnancy and Breastfeeding

• There is limited data on the safety of Em-gality during pregnancy and breastfeeding.
• Animal studies suggest no major risk, but human studies are lacking.
• Discuss potential risks and benefits with your doctor if you are pregnant or plan to become pregnant.

Immune System Effects

Em-gality affects the immune pathway involving CGRP, which might interfere with natural inflammation and healing processes. The long-term impact of this is still being studied.

Who Should Avoid Emgality?

Emgality may not be suitable for everyone. It is contraindicated in the following groups:

• Individuals with a known allergy to galcanezumab or any component of the formulation
• Those with severe gastrointestinal conditions
• People with certain cardiovascular issues, especially if advised by a cardiologist

Always provide a full medical history to your healthcare provider before starting Em-gality.

Emgality Interactions With Other Medications

Emgality has a low potential for drug-drug interactions, as it is a monoclonal antibody and not metabolized by the liver (unlike many oral medications). However, you should always inform your healthcare provider about all medications and supplements you’re taking.

Possible Interactions Include:

• Other migraine treatments, especially CGRP inhibitors (like Aimovig or Ajovy)
• Immunosuppressants, which may interact with monoclonal antibodies
• Medications that may also cause constipation or hypersensitivity

Combination with Other Treatments:

• Em-gality can often be used alongside acute migraine treatments, such as:
  • Triptans
  • NSAIDs
  • Ergotamines
• There is no evidence of harmful interactions with these, but timing and dosage should be carefully monitored.

Overdose

Overdosing on Emgality is rare due to its administration method and monthly dosing schedule.

Symptoms of Overdose:

• Unusual swelling
• Breathing difficulty
• Severe allergic reaction
• Worsening of constipation

What to Do in Case of Overdose:

• Contact your doctor immediately
• Seek emergency medical attention
• Bring the Em-gality packaging with you if visiting the ER

There is no known antidote, and treatment is generally supportive.

What to Do If You Miss a Dose

Consistency is key for this medication to work effectively. However, if you miss a dose:

For Migraine:

• Take the missed dose as soon as you remember.
• Resume your regular monthly schedule thereafter.

For Cluster Headache:

• Speak with your doctor, as timing is critical during cluster periods.

Do not take extra injections to “make up” for a missed dose. Never double dose without medical guidance.

Real-World Effectiveness and Patient Reviews

Patients generally report positive results from Emgality, especially in reducing the frequency and severity of migraines. Some users note:

• “Life-changing” reduction in migraine days
• Improved quality of life
• Less reliance on acute pain medications

However, some patients experience minimal improvement, and others discontinue due to side effects like constipation or injection site discomfort.

Success Stories:

• Patients with chronic migraines (20+ days/month) have reported a reduction to 5–10 days/month
• Cluster headache sufferers say Em-gality helps break the cycle of attacks

How to Store and Handle

• Refrigerate Emgality between 36°F and 46°F (2°C–8°C)
• Can be kept at room temperature (up to 86°F or 30°C) for 7 days
• Do not freeze
• Keep in original packaging until use
• Protect from sunlight and heat

Final Thoughts

Emgality is a valuable treatment option for adults suffering from migraine headaches. While it can cause side effects and interact with other medications, the benefits of Em-gality can outweigh the risks for many patients. By understanding the uses, side effects, warnings, precautions, interactions, overdose, and missed dose information, patients and healthcare providers can work together to optimize treatment outcomes.

If you or someone you know is battling chronic migraines or cluster headaches, talk to your doctor about whether this medication may be the right choice.

Frequently Asked Questions (FAQs) About Emgality