At 85, a prolonged cough despite taking co-amoxiclav (Augmentin) and cetirizine requires professional evaluation rather than more over-the-counter supplements. Please do not add new medicines without a doctor's guidance. A persistent cough can sometimes indicate a different type of infection, fluid accumulation, or medication side effects that antibiotics cannot treat. I highly recommend having his doctor listen to his lungs and potentially order a chest X-ray. For now, keep him well-hydrated, encourage warm fluids, and ensure he rests comfortably. A medical checkup is the safest next step to help him recover.

Two days is often too short to see complete healing, but a lack of improvement can happen for a few reasons. The bacteria causing the infection might be resistant to amoxicillin/clavulanate (Augmentin) and framycetin (Soframycin). Travel can also expose your skin to unfamiliar bacterial strains. Additionally, if there is a collection of pus beneath the skin, antibiotics struggle to penetrate the area, and it may need to be professionally drained. Please keep the area clean, avoid squeezing them, and consult a doctor to see if a different medication or a simple clinic drainage is necessary.

Since seasonal colds are usually viral, antibiotics like Augmentin Duo and supplements like Nutrolin B Plus are not needed and would not help. For your sore throat, warm saltwater gargles and generic paracetamol can provide safe, effective relief. For the dry cough, a simple over-the-counter generic cough suppressant containing dextromethorphan can help soothe your airways. Please focus on getting plenty of rest, staying hydrated with warm fluids, and using steam inhalation. If your symptoms do not improve in a few days or worsen, please consult a healthcare professional.

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It is very common to experience lingering symptoms like this after COVID-19, and I understand how frustrating it is. Since Augmentin did not help, your symptoms are likely not from a simple bacterial infection. The dripping sensation and green mucus suggest post-nasal drip, which frequently triggers a cough, especially when lying down or waking up. This post-viral inflammation can mimic or trigger allergies or asthma. I highly recommend consulting a doctor. They can evaluate you for asthma or allergies and may suggest a steroid nasal spray, like fluticasone, or oral antihistamines to reduce the swelling. Saline nasal rinses can also safely help clear the blockage in the meantime.

Since the remaining bumps are painless and slowly healing, it shows your body is recovering well and this is not a sign of a serious condition. Often, skin tissue takes an extra one to two weeks to fully heal and fade even after finishing your 7-day course of Augmentin (amoxicillin/clavulanate) and Fudic cream (fusidic acid). You likely do not need more medication. Simply keep the area clean and dry. However, if you notice new pain, redness, or pus returning, please follow up with your doctor.