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MRP: Rs. 159 for 1 packet(s) (10 ML eye drop each)
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food interaction for C-NAC

alcohol interaction for C-NAC

pregnancy interaction for C-NAC

lactation interaction for C-NAC

There is no data available. Please consult doctor before consuming the drug.
Interaction with alcohol is unknown. Please consult your doctor.
C-nac eye drop may be unsafe to use during pregnancy.
Either animal studies have shown adverse effect on fetus and there are no human studies or studies in human and animals are not available. It should be given only if potential benefits justifies risk to the fetus. Please consult your doctor.
Unknown. Human and animal studies are not available. Please consult your doctor.


Glycerol(10 mg)


Glycerol is used in the treatment of dry coughs and sore throats, constipation or raised pressure in brain cavity and management of dry, flaky or itchy skin conditions such as eczema or dermatitis. It is also used as an adjunct in treating glaucoma (increased pressure inside the eye that causes visual problems).

How it works

Glycerol belongs to the class of medications called laxatives and ophthalmic osmotics. It acts by absorbing water into the gut, relaxing the stools and relieving constipation. In the management of glaucoma it works by removing excess of water thereby controlling pressure in the eye.

Common side effects

Vomiting, Nausea, Excessive thirst, Abdominal bloating, Abdominal cramp, Diarrhoea, Dizziness, Headache, Injection site inflammation, Injection site pain, Pain, Irritation
Carboxymethylcellulose(1% w/v)


Carboxymethylcellulose is used in the treatment of dry eye symptoms such as soreness, burning, irritation and discomfort.

How it works

Carboxymethylcellulose in the form of eye drops belongs to a class of medicines called eye lubricants or artificial tears. It reduces dryness and irritation by wetting and lubricating the surface of eye. Because of its thick consistency, it is retained for longer duration in the eye providing relief.

Common side effects

Allergic reaction, Blurred vision, Eye discharge, Eye irritation, Eye itching, Eye pain, Foreign body sensation in eyes, Increased production of tears, Eye redness, Visual impairment
n-acetylcarnosine(3% w/v)


N-acetylcarnosine is used to prevent and treat age-related disorders of the eye including cataracts (clouding of the lens of your eye that severely affects eyesight).

How it works

N-Acetylcarnosine belongs to a class of medications called anti-oxidants and is similar to naturally occurring substance called L-carnosine in the eye. It prevents and reverses the hardening and clouding or discoloration of the eye lens thereby preventing and treating age-related cataracts.

Common side effects

Tingling sensation

Common Dosage

Patients taking this medicines

  • 43%
    Three Times A Day
  • 29%
    Four Times A Day
  • 29%
    One Time A Day


No substitutes found

Expert advice for C-NAC

  • Do not start or continue the glycerol syrup or oral solution and consult your doctor if you have diabetes or intolerance to sugars as this medicine contains glucose and sucrose.
  • Exercise caution while using glycerol suppositories if you have appendicitis (inflammation of the appendix) or rectal bleeding.
  • Do not give cough relief oral solution to children under 1 year but cough syrup containing glycerol is recommended in children 3 months to 1 year.
  • Avoid contact with the eyes while using glycerol cream as it may cause irritation to the epithelial cells of the cornea.
  • Do not take if patient is allergic to glycerol or any of its ingredients.
  • Do not given to patient with kidney diseases.
  • Do not given to pregnant women should not use glycerol suppositories in the first three months of pregnancy.

Frequently asked questions for C-NAC


Q. Is glycerol an alcohol, carbohydrate, sugar, vegan, lipid, or amino acid?
Glycerol can be classified as an alcohol, carbohydrate, sugar, or vegan but it does not contain lipid, or amino acid. 

Q. Is glycerol and glycerin the same?
Glycerol is the pure chemical product and its commercial product is called glycerin. Glycerin is needed to produce glycerol.

Q. Is glycerol polar, conduct electricity, soluble in water or oil, and has hydrogen bonding?
Glycerol is polar, conducts electricity, soluble in water and has hydrogen bonding.

Q. Does glycerol contain nitrogen?
No, glycerol does not contain nitrogen.

Q. Does glycerol evaporate and freeze?
Glycerol does not evaporate but it can freeze below 18°C.

Q. Can you take glycerol with paracetamol?
Yes, you can take glycerol with paracetamol.


Q. What is carboxymethylcellulose?
Carboxymethylcellulose in the form of eye drops belongs to a class of medicines called eye lubricants or artificial tears. It is used in the treatment of dry eye symptoms such as soreness, burning, irritation and discomfort.
Q. Is carboxymethylcellulose safe?
Yes. Carboxymethylcellulose is safe if used at prescribed doses for the prescribed duration as advised by your doctor.


Content on this page was last updated on 04 February, 2016, by Dr. Varun Gupta (MD Pharmacology)