Limited improvement is anticipated because Zyrtec is an antihistamine and is not a conventional treatment for psoriasis. Topical therapies, phototherapy, or systemic drugs given by a dermatologist are the most effective ways to manage psoriasis.

Your symptoms suggest a viral upper respiratory infection that has caused acute laryngitis (inflammation of your vocal cords), likely aggravated by post-nasal drip from your runny nose. For relief, I recommend complete voice rest and avoid whispering, as it strains your vocal cords more. Stay well-hydrated with warm fluids and use saline nasal drops or an over-the-counter antihistamine like Cetirizine (10 mg once daily) to dry up the runny nose. Do not take antibiotics, as this is likely a viral issue. If your voice does not recover in a week or if you develop breathing difficulties, please consult a doctor.

Since your itching has lasted for three months and worsens at night, it is important to see a doctor for a proper diagnosis, as it could be due to eczema, scabies, or even pregnancy-related liver issues (if applicable). For temporary relief, you can apply an over-the-counter 1% hydrocortisone cream to the affected area twice daily. Taking an oral antihistamine like cetirizine (10 mg) once daily can also help reduce nighttime itching. Keep your skin well-hydrated with a fragrance-free moisturiser, use mild soaps, and avoid hot showers. Please consult a healthcare professional before starting any long-term treatment.