Yes, it is necessary to use all three medications as prescribed. Your symptoms suggest an allergic reaction combined with a bacterial infection, causing the swelling. Winolap is an antihistamine that treats your allergy symptoms, like watery eyes and a runny nose. Moxigram eye drops and Zymar ointment are both fluoroquinolone antibiotics. Using both ensures continuous, round-the-clock infection control. The drops are ideal for daytime use, while the ointment provides long-lasting treatment overnight. Skipping any of these can delay your recovery or worsen the infection. Ensure you space the eye drops at least 5 to 10 minutes apart, applying the ointment last.

No, Extralube cannot be used as a substitute for Moxigram. Moxigram contains moxifloxacin, a powerful antibiotic essential for preventing serious bacterial infections after cataract surgery. Extralube is merely a lubricating eye drop (artificial tears) used to soothe dry eyes and contains no infection-fighting properties. Using Extralube instead of Moxigram puts your father at a very high risk of developing a severe, sight-threatening post-surgical infection. Please purchase the prescribed Moxigram eye drops immediately and use them exactly as directed by his eye surgeon.