The minor, common side effects of propylene glycol include temporarily blurry vision, irritation, stinging and minor burning. Some of the more serious side effects include eye pain, altered vision and ongoing irritation in the eyes. Medical attention is necessary for the more serious side effects, according to WebMD.
Propylene glycol is a medication that relieves dryness and irritation in the eyes. Patients use this most frequently after exposure to sun, wind, extended periods of computer use or reading, as well as air conditioning or heating systems. Lubrication is important for keeping the eye free of infection and injury and reducing the feeling that an object is stuck in the eye, as well as reducing itching and burning, as stated by WebMD.
In most cases, patients can use propylene glycol as often as needed in drop form, and in ointment form, use can take place once or twice a day. Daily use ointment often has best results when applied at bedtime. People who wear contact lenses should remove them before using eye lubricants unless their lenses indicate on the packaging that they do not need to come out, notes WebMD.
In some cases, swelling and itching in the throat, rash, dizziness and difficulty breathing indicate a severe allergic reaction. In those cases, it is important to seek medical attention immediately, states WebMD.