Spaglumic Acid (N-acetyl-aspartyl-glutamic acid): Uses & Dosage

Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is an anti-allergy eye drop that works as a mast cell stabiliser, historically used to treat allergic conjunctivitis.

Drug class	Mast Cell Stabiliser
Type	Single
Forms	Eye Drop
Common strength	4.9%
Common Indian brands	Naaxia (abroad)
Prescription status	Prescription

What Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is used for

Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is an anti-allergy eye medicine that was historically used to help manage symptoms of certain eye conditions, particularly those involving allergic reactions. At Pristine Eye Hospitals, we believe in providing you with comprehensive information about various eye medicines, even those that may not be routinely available in India.

Specifically, Spaglumic Acid has been used for:

Allergic Conjunctivitis: This is a common eye condition where the transparent membrane covering the white part of your eye and the inside of your eyelids (the conjunctiva) becomes inflamed due to an allergic reaction. Symptoms often include redness, itching, watering, and a gritty sensation in the eyes.

It’s important to understand that while this medicine has a history of use for allergic conjunctivitis, it is considered a legacy agent and is not currently approved or routinely available in India. Your ophthalmologist at Pristine Eye Hospitals can discuss modern, approved alternatives that are suitable for your specific condition.

How it works

Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) belongs to a group of medicines known as ‘mast cell stabilisers’. To understand how it works, let’s first look at what happens during an allergic reaction in your eyes.

When you are exposed to something you are allergic to (an allergen, like pollen, dust mites, or pet dander), your body’s immune system overreacts. In your eyes, this reaction often involves special cells called ‘mast cells’. These mast cells contain tiny sacs filled with chemicals, including histamine, which are responsible for many of the uncomfortable symptoms of allergies like itching, redness, and watering.

When an allergen triggers an allergic response, the mast cells release these chemicals. Spaglumic Acid works by ‘stabilising’ the membranes of these mast cells. By doing so, it helps prevent the mast cells from releasing their stored chemicals, such as histamine, when they encounter an allergen. This action reduces the allergic reaction in your eyes, thereby helping to alleviate symptoms like itching, redness, and excessive tearing associated with allergic conjunctivitis.

Because it works by preventing the release of these chemicals, mast cell stabilisers like Spaglumic Acid are often more effective when used regularly to prevent symptoms, rather than just to treat acute flare-ups. However, as mentioned, this is a legacy agent, and your ophthalmologist will guide you on the most appropriate and currently available treatments for your allergic eye conditions.

How it’s used

Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is an eye drop, and like all eye medicines, it should be used exactly as prescribed by your ophthalmologist. While this medicine is a legacy agent and not routinely available in India, understanding the typical usage pattern can be helpful for general knowledge.

The usual recommended dosing for Spaglumic Acid 4.9% eye drops was:

One drop into the affected eye(s) four times a day.

It is crucial to follow your doctor’s instructions regarding the frequency and duration of use. Do not alter the dose or stop using the medicine without consulting your ophthalmologist, even if your symptoms improve. Consistent use is often key for mast cell stabilisers to be effective in preventing allergic reactions.

For proper instillation of eye drops, please refer to the general patient education section below. Always ensure your hands are clean before handling eye drops, and avoid touching the tip of the dropper to your eye or any other surface to prevent contamination.

Remember, this information is for educational purposes. Always consult your ophthalmologist at Pristine Eye Hospitals for a proper diagnosis and prescription of suitable eye medicines.

Always follow your ophthalmologist’s exact instructions.

Brands available in India

Naaxia (abroad)

Brand availability and pricing vary; confirm with your pharmacist.

Good to know

Prescription eye medicine — use only as directed by a qualified ophthalmologist. This page is for general education and is not a substitute for professional medical advice, diagnosis or a prescription. Do not self-medicate or reuse an old prescription. Not currently approved or routinely available in India — included for reference; ask your ophthalmologist about approved alternatives.

Precautions & side effects

When considering any eye medicine, it’s important to be aware of potential precautions and general safety guidelines. While Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is a legacy agent and not routinely available in India, the following general principles apply to its use, and to eye medicines in general:

Prescription Medicine: Spaglumic Acid is a prescription eye medicine. This means it should only be used under the guidance and direction of a qualified ophthalmologist. Self-medication or using an old prescription can be harmful and is strongly discouraged.
Legacy Agent: It is important to note that Spaglumic Acid is considered a legacy agent. This means newer, potentially more effective, or more widely available treatments may exist. Your ophthalmologist at Pristine Eye Hospitals will be able to advise you on the most appropriate and current treatment options for your condition.
Not Routinely Available in India: Currently, Spaglumic Acid is not approved or routinely available in India. This information is provided for reference and educational purposes. Please discuss approved alternatives with your ophthalmologist.
Contamination: Always ensure your hands are clean before applying eye drops. Avoid touching the tip of the dropper to your eye, eyelid, or any other surface to prevent contamination of the medicine. Contaminated eye drops can lead to serious eye infections.
Contact Lenses: If you wear contact lenses, your ophthalmologist will advise you whether you need to remove them before instilling the drops and how long to wait before reinserting them. Generally, it’s advisable to remove contact lenses before using eye drops and wait at least 15 minutes before putting them back in, unless specifically instructed otherwise.
Blurred Vision: Some eye drops can temporarily cause blurred vision immediately after instillation. If this occurs, avoid driving or operating machinery until your vision clears.
Allergic Reactions: Although the medicine itself is for allergies, it’s possible for some individuals to have an allergic reaction to one of the components of the eye drop. If you experience severe redness, swelling, itching, or difficulty breathing after using the drops, seek immediate medical attention.
Other Eye Conditions: Inform your ophthalmologist about any other eye conditions you have, such as glaucoma, cataracts, or eye injuries, as these might influence the choice of medication.
Other Medications: Always tell your doctor about all other medicines you are taking, including over-the-counter drugs, herbal supplements, and other eye drops, to avoid potential interactions.

This page is for general education and is not a substitute for professional medical advice, diagnosis, or a prescription. Always consult your ophthalmologist for personalised care.

Welcome to Pristine Eye Hospitals, your trusted partner in eye care. We believe that informed patients make the best decisions about their health. This section provides general education about allergic eye conditions, how to correctly use eye drops, and essential hygiene practices to protect your vision.

Understanding Allergic Conjunctivitis

Allergic conjunctivitis is a very common eye condition, especially in countries like India where environmental allergens are prevalent. It occurs when your eyes react to substances that are usually harmless to most people, such as pollen, dust mites, pet dander, or certain cosmetics. When these allergens come into contact with your eyes, your immune system overreacts, releasing chemicals like histamine. These chemicals cause the blood vessels in your conjunctiva (the clear membrane covering the white part of your eye and the inside of your eyelids) to dilate and become inflamed.

Common symptoms of allergic conjunctivitis include:

Itching: This is often the most prominent and bothersome symptom.
Redness: Your eyes may appear bloodshot due to dilated blood vessels.
Watering: Excessive tearing is common as your eyes try to wash away the irritant.
Swelling: The eyelids or the conjunctiva itself can become puffy.
Gritty or burning sensation: You might feel like something is in your eye.
Sensitivity to light (photophobia): In some cases, bright light can be uncomfortable.

While allergic conjunctivitis is usually not serious and doesn’t typically cause permanent vision loss, it can be very uncomfortable and affect your daily life. Identifying and avoiding your triggers is the first step in managing the condition. Your ophthalmologist at Pristine Eye Hospitals can help you understand your specific type of allergy and recommend the most effective treatment plan, which may include eye drops, oral medications, or lifestyle adjustments.

Correctly Using Eye Drops

Many eye conditions, including allergic conjunctivitis, are treated with eye drops. Proper instillation is crucial to ensure the medicine works effectively and to prevent contamination. Here’s a step-by-step guide:

Wash Your Hands: Always start by thoroughly washing your hands with soap and water. This is the most important step to prevent introducing germs into your eyes.
Check the Bottle: Before each use, check the expiry date on the bottle. Do not use expired medication. Also, ensure the dropper tip is clean and undamaged.
Shake (if instructed): Some eye drops require gentle shaking before use. Read the instructions on your specific medicine.
Position Yourself: Tilt your head back or lie down. You can also use a mirror to help you see.
Create a Pocket: Gently pull down your lower eyelid with one finger to create a small pocket.
Administer the Drop: Hold the dropper bottle upside down with your other hand, positioning it directly over your eye. Avoid touching the tip of the dropper to your eye, eyelid, or eyelashes, as this can contaminate the medicine. Squeeze the bottle gently to release one drop into the pocket you created.
Close Your Eye Gently: After instilling the drop, close your eye gently for 1-2 minutes. Do not squeeze your eye shut or blink excessively, as this can push the medicine out.
Apply Pressure (Optional but Recommended): Gently press your finger against the inner corner of your eye (near your nose) for a minute or two. This helps prevent the medicine from draining into your tear duct and entering your bloodstream, allowing more of it to stay in your eye where it’s needed.
Wipe Excess: Gently blot any excess liquid around your eye with a clean tissue.
Wash Hands Again: Wash your hands again to remove any medicine.

If you need to use more than one type of eye drop, wait at least 5-10 minutes between different medications to allow each drop to be absorbed properly. If you are also using an eye ointment, apply the drops first, then the ointment.

General Eye Hygiene and Storage

Maintaining good eye hygiene and properly storing your eye medicines are vital for your eye health and the effectiveness of your treatment:

Never Share Eye Drops: Eye drops are prescribed for individual use. Sharing them can spread infections.
Discard After Opening: Most eye drop bottles should be discarded a specific period after opening (usually 28 days), even if there is still medicine left. This is because once opened, the sterility of the drops cannot be guaranteed. Check the instructions on your specific medicine.
Proper Storage: Store your eye drops as directed on the packaging. Most eye drops should be kept at room temperature, away from direct sunlight and excessive heat or cold. Do not freeze them unless specifically instructed. Keep all medicines out of reach of children.
Avoid Rubbing Your Eyes: Especially if you have an allergic condition, rubbing your eyes can worsen irritation and inflammation. If your eyes are itchy, try using a cold compress or artificial tears (if approved by your doctor) for relief.
Cleanliness: Keep your hands clean, especially before touching your eyes. Avoid touching your eyes unnecessarily.
Contact Lens Care: If you wear contact lenses, follow your ophthalmologist’s advice regarding their use during treatment. Always clean and store your lenses properly.
When to Seek Help: If your symptoms worsen, do not improve after a few days of treatment, or if you experience new symptoms like severe pain, vision changes, or pus-like discharge, contact Pristine Eye Hospitals immediately. These could be signs of a more serious condition.

At Pristine Eye Hospitals, your vision is our priority. We are here to provide you with expert care and guidance every step of the way. Always remember to consult your ophthalmologist for any concerns or questions regarding your eye health and medications.

Frequently asked questions

What is Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) used for?

Spaglumic Acid is an anti-allergy eye drop that was historically used to treat allergic conjunctivitis, a condition where the eyes become red, itchy, and watery due to an allergic reaction.

How does Spaglumic Acid work?

Spaglumic Acid works as a 'mast cell stabiliser'. It prevents certain cells in your eyes (mast cells) from releasing chemicals like histamine, which cause allergic symptoms such as itching, redness, and watering. By stabilising these cells, it helps reduce the allergic reaction.

What are the common Indian brands for Spaglumic Acid?

Spaglumic Acid (N-acetyl-aspartyl-glutamic acid) is not currently approved or routinely available in India. It is considered a legacy agent, and the brand 'Naaxia' is known abroad. Your ophthalmologist at Pristine Eye Hospitals can discuss approved alternatives available in India.

How should I use Spaglumic Acid eye drops?

If prescribed, Spaglumic Acid 4.9% eye drops were typically used by instilling one drop into the affected eye(s) four times a day. It is crucial to follow your ophthalmologist's specific instructions for any eye medicine, including the correct technique for instilling drops, frequency, and duration of use. Always wash your hands before and after use, and avoid touching the dropper tip to your eye or any surface.

Do I need a prescription for Spaglumic Acid eye drops?

Yes, Spaglumic Acid is a prescription eye medicine. It should only be used under the guidance and direction of a qualified ophthalmologist. This medicine is not currently approved or routinely available in India, and self-medication is strongly discouraged.

What are the key precautions I should be aware of when using Spaglumic Acid?

Key precautions include: using it only as directed by an ophthalmologist (it's a prescription medicine), understanding that it's a legacy agent and not routinely available in India, avoiding contamination of the dropper tip, and informing your doctor about any other eye conditions or medications you are using. If you wear contact lenses, your doctor will advise you on when to remove and reinsert them. Always consult your ophthalmologist for personalised advice.

References

Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.

This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.