Patanol Eye Drops

Patanol Eye Drops

Patanol Eye Drops




Patanol Eye Drops or Olopatadine hydrochloride ophthalmic solution is allergic conjunctivitis eye drops. It is antihistamine medication which can be used to decrease the signs and symptoms of allergic eye condition or allergic conjunctivitis such as red eye, itching, burning sensation and excessive tearing or watery eyes.This eye drop will block type 1 histamine receptors on mast cells.



Patanol Eye Drops comes in 5 ml bottle with a concentration of 0.1%. It should be taken twice daily for up to 6 weeks or according to your doctor recommendations. The half-life in plasma was approximately 3 hours, and elimination from the body is predominantly through renal excretion.



Ingredients of Patanol Eye Drops

Active ingredients

Olopatadine hydrochloride.


Benzalkonium chloride.

Inactive ingredients

Bibasic sodium phosphate, sodium chloride; hydrochloric acid/sodium hydroxide to adjust pH and purified water.




Store at 39°F-77°F (4°C-25°C) away from light and moisture. Do not store in the bathroom and always keep all medications away from children and pets.



It's safety in pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women.


Breast Feeding

It is not known whether topical ocular administration could result in sufficient systemic absorption to produce detectable quantities in the human breast milk.


Pediatric Use

Safety and effectiveness in pediatric patients below the age of 3 years have not been well established.



Side Effects of Patanol Eye Drops


1- The most common side effect is Headache which has been reported in 7% of the patients.

2- Other side effects that have been reported in less than 5% of patients:

  • Mild burning sensation, foreign body sensation stinging, irritation, itching, redness, or dryness of the eyes.
  • Blurred vision.
  • Swelling or puffy eyelids.
  • Stuffy or runny nose, cough and sore throat.
  • Unusual or unpleasant taste in mouth.
  • Serious allergic reactions (rash, itching, swelling of the face, tongue and throat dizziness, trouble breathing) to this drug are unlikely, but in case you have any of these, seek immediate medical attention as soon as possible.




1- Before using this medication you should tell your doctor about:

  • If you have allergy to this medication, benzalkonium chloride (the preservative) or any other type of allergies.

  • All prescription and non-prescription medications that you are using.

  • Bacterial Eye infections.

2- Don’t use this medication when you are wearing contact lens because the preservative in this eye drops can cause discoloration of the lens and also can participate of the surface which can increase the risk of corneal infection. Wait at least 10 minutes after applying the eye drop to wear contact lens.

3- If you are using more than one eye drop at the same time wait 5 minutes between each one and always keep the ointment to the last.


How long does patanol take to work


Patanol has two mechanisms of action. The first one is inhibition of Histamine 1 receptors and reduce allergic symptoms such as redness, itching and excessive tearing.

Usually it takes few days for this mechanism of action to work. The second mechanism is inhibition of histamine release from Mast cells which usually takes 2-3 weeks to work.



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