I'm having seborrhoeic dermatitis and taking neurovit, apo-cetirizine, lysozyme 30mg.but i think i'm fever due to cold weather (i don't have a thermometer but i feel headache and dry-eyes).can i take acetaminophen-containing product at the same time?

Sure: Get a thermometer. You're taking a pricey mix of vitamins, an antihistamine, and lysozyme which is probably doing you no good. Seborrheic dermatitis is easily managed by evidence-based medicine -- what you're taking won't touch it but if you want "natural", you can choose from sulfur, coal tar, or a variety of other stuff that will. Best wishes.