Pharmacist guide to conjunctivitis care
Seeing Red? The Ultimate Guide to Treating Pink Eye
Mild conjunctivitis may improve on its own, but not every red or irritated eye is simple pink eye. Discharge, pain, light sensitivity, vision change, contact-lens use, or symptoms that are not improving can change the safest next step.
Educational information only; not a diagnosis or a substitute for individual medical advice.
A quick pharmacist answer
Viral pink eye commonly heals without antibiotic drops. Mild bacterial conjunctivitis may also be self-limited, but thick pus-like discharge, eyelids that repeatedly stick together, or worsening symptoms are reasons to seek assessment. Because allergy, dry eye, medication effects, corneal problems, and other conditions can look similar, it is wise to have a clinician assess your eye before starting treatment.
Understand the cause
Is it viral, bacterial, allergic, or something else?
Viral conjunctivitis
Often watery and may occur with a cold. Antibiotics do not treat viruses. Symptoms frequently improve on their own, although recovery may take a week or longer.
Bacterial conjunctivitis
May cause thicker yellow or green discharge and crusting. Mild cases can resolve without antibiotics, but treatment may be appropriate after assessment.
Allergic conjunctivitis
Often causes intense itching, watering, and symptoms in both eyes. Allergy treatment—not antibiotics—may be the right approach.
Irritation or another eye condition
Dry eye, smoke, chemicals, a foreign body, contact-lens problems, skin conditions, and some medicines can cause redness or irritation that mimics pink eye.
Can viral pink eye become bacterial?
A viral illness can occasionally be followed by or occur alongside a bacterial infection, but this is not inevitable. If the discharge becomes thicker, symptoms worsen, or the pattern changes, return for reassessment rather than assuming antibiotics are automatically needed.
Red flags
When a red eye needs prompt care
Seek prompt medical or eye-care assessment for any of the following:
- eye pain rather than mild grittiness or irritation
- new or worsening vision changes
- marked sensitivity to light
- a rash, blisters, or swelling on or near the eye
- severe headache, nausea, a cloudy-looking eye, or an unusual pupil
- chemical exposure, injury, or a possible foreign body
- significant symptoms in a contact-lens wearer
- severe swelling, rapidly worsening symptoms, or symptoms in a newborn
These features can indicate a problem more serious than routine conjunctivitis.
Hygiene and contact lenses
- Wash your hands before and after touching your eyes or applying eye medicine.
- Avoid rubbing your eyes.
- Do not share towels, washcloths, pillows, eye makeup, contact-lens equipment, or eye medicine.
- Use a separate clean cloth for the affected eye and wash linens regularly.
- Do not wear contact lenses while your eyes are red, irritated, or infected.
- Wear glasses until symptoms have cleared and a professional or the product instructions say it is safe to resume lenses.
- Clean or replace lenses and the storage case as directed after the infection.
Some preservatives may be absorbed by or discolour soft contact lenses. Do not use medicated drops while wearing lenses unless the product and your clinician specifically permit it.
How to apply eye drops safely
- 1Read the label, confirm the correct eye and dose, and check whether the bottle needs shaking.
- 2Wash and dry your hands.
- 3Tilt your head back and look upward.
- 4Gently pull down the lower eyelid to form a small pocket.
- 5Hold the bottle above the eye without letting the tip touch the eye, eyelid, eyelashes, fingers, or another surface.
- 6Instill one drop into the lower-eyelid pocket. Follow the bottle design: some containers are gently squeezed; others release a drop when the bottom is pressed.
- 7Close the eye gently. If instructed, press lightly at the inner corner near the nose for 30–60 seconds.
- 8Replace the cap without touching the tip and wash your hands again.
If a drop misses the eye, wipe it away with a clean tissue and try again. Do not share your bottle.
Treatment and medicine safety
What to expect—and when to return
Temporary blur or stinging
Ointments and thicker drops may temporarily blur vision. Rest for a few minutes and wait until vision is clear before driving, using machinery, or walking on stairs. Brief stinging can occur, especially when the eye is inflamed. Severe pain, worsening blur, persistent burning, or reduced vision needs prompt assessment.
Improvement within two to three days
When antibacterial drops are appropriate, symptoms often begin improving within two to three days. If there is no improvement after about 48 hours, symptoms worsen, or the infection returns, contact your pharmacist or doctor. Viral conjunctivitis does not improve with antibiotics and may last a week or longer.
Steroid eye drops require supervision
Do not self-start or continue corticosteroid eye drops based only on a previous prescription. Steroids can mask or worsen certain infections and cause other eye complications. Use them only when explicitly directed by an appropriate clinician, for the exact duration given, with follow-up when advised.
Check the after-opening date
Many multidose eye-drop bottles are discarded 28 days after opening, but this is not universal. Write the opening date on the label and follow the package or pharmacist instructions. Do not use a bottle past its after-opening date or printed expiry. Medicine used during an active infection may need to be discarded after treatment; ask your pharmacist about safe disposal.
Medication review matters
Some medicines and health conditions can contribute to dry, red, or irritated eyes. Tell your pharmacist when symptoms began, whether one or both eyes are affected, what the discharge looks like, whether you wear contacts, and every prescription, non-prescription, and eye product you use. A medication review can help identify irritation that is imitating pink eye.
Red, irritated, or discharging eye? Ask a MedBox pharmacist
MedBox pharmacists can assess eligible bacterial, viral, and allergic conjunctivitis, review your medicines and contact-lens use, recommend supportive care, prescribe when appropriate, or refer you for urgent eye assessment.
Sources
- Ontario College of Pharmacists — Minor Ailments Prescribing — Pharmacist scope and ophthalmic steroid prescribing caution.
- HealthLink BC — Pinkeye — Symptoms, hygiene, contact lenses and eye-drop technique.
- HealthLink BC — Pink Eye — Causes, recovery, response and red flags.
- American Academy of Ophthalmology — Conjunctivitis Preferred Practice Pattern — Self-limited disease and antibiotic or steroid cautions.
- Moorfields Eye Hospital — How to Use Eye Drops — Instillation and after-opening guidance.
- Health Canada Drug and Health Products Portal — Eye Drop Instructions — Bottle technique, contact lenses and disposal.
- Health Canada VIGAMOX Product Monograph — Infection-use instructions, temporary blur and disposal.