Since fexofenadine (Allegra) hasn't helped, the symptoms might be caused by uncontrolled allergic rhinitis, post-nasal drip, or potentially cough-variant asthma. A pediatrician or pediatric allergist can help pinpoint the exact cause. They might recommend generic options like a nasal steroid spray or saline rinses to calm the inflammation, or evaluate him for asthma. I highly recommend scheduling a doctor's visit to help him finally get some restful sleep.

While sneezing and watery eyes can be allergies, your chest congestion, fatigue, and night fevers suggest a viral respiratory infection, especially since fexofenadine hasn't provided relief. Given your heart valve history and medications like acenocoumarol, carvedilol, and furosemide/spironolactone, please avoid over-the-counter decongestants and NSAIDs (like ibuprofen), as they can dangerously affect your blood pressure and bleeding risk. Safe remedies include steam inhalation and saline nasal sprays. Paracetamol is generally safer for fever but should be used cautiously. Please consult your doctor or cardiologist promptly to ensure you receive a safe, tailored treatment plan.

While fexofenadine (Allegra) is usually non-drowsy, it can occasionally cause insomnia in some people. It is generally safe to switch to cetirizine or diphenhydramine while using oral terbinafine and topical ketoconazole, as there are no major interactions. Diphenhydramine is more sedating and might help you sleep while easing the itch, while cetirizine is a good once-daily option that is mildly sedating. Please check with your doctor or pharmacist to ensure these options are right for you.

Since topical treatments and corticosteroid creams haven't worked?and steroids can sometimes actually worsen fungal infections?the standard clinical approach is to transition to prescription oral antifungal tablets, such as terbinafine or itraconazole. These medications work from the inside out to effectively eliminate the fungus from your face, stomach, and thighs. I highly recommend visiting a healthcare provider or dermatologist so they can safely prescribe the correct oral medication and monitor your progress.

Chronic nasal congestion often leads to mouth breathing, which can cause saliva to pool and look like frothing at night. The nasal redness is likely from rubbing. The abdominal pain could be a mild reaction to Allegra (fexofenadine) or Sinarest, particularly if taken without enough food, or from swallowing excess mucus. Please keep him hydrated and comfortable. I highly recommend visiting his pediatrician to safely investigate these symptoms and review his medicines.

Hand, foot, and mouth disease typically resolves within 7 to 10 days, and the rash spreading can be a normal part of the process before it heals. While it is wonderful his fever has subsided, his continued vomiting is important to address. Because vomiting can lead to dehydration in a 17-month-old, please contact his pediatrician for a quick evaluation. In the meantime, continue the hydroxyzine (Atarax) and calamine to keep him comfortable, and offer small, frequent sips of fluid.

While fexofenadine (Allegra) and the cough formula (Grilinctus) worked well for you in the past, a cough lasting over four weeks really warrants a fresh medical evaluation before restarting them. Chronic coughs can stem from various manageable sources, such as allergies or cough-variant asthma, and the cause might be different this time. I gently advise consulting your doctor to safely identify the root cause and ensure you get the most effective, targeted treatment.

Since they temporarily improve with antihistamines and antibiotics, this could point to an allergic reaction, recurrent hives (urticaria), or a mild inflammatory skin condition. Sometimes, certain antibiotics also have anti-inflammatory effects, which can temporarily mask the underlying issue. I highly recommend scheduling a consultation with a dermatologist or an allergist. They can perform a detailed evaluation, which may include allergy testing, blood work, or a simple skin biopsy during an active flare-up to pinpoint the exact cause.

Since it has lasted four days without improvement despite taking azithromycin, it is very important to see a doctor for an in-person evaluation. Because azithromycin is an antibiotic, it won't help if your infection is viral, such as mononucleosis, or if it is caused by a resistant bacterial strain. A healthcare provider can perform a quick throat swab to check for strep throat. To help you feel more comfortable in the meantime, you can gargle with warm salt water and take over-the-counter pain relievers like ibuprofen or acetaminophen.

A chronic rash that does not fully respond to fexofenadine (Allegra) could be chronic urticaria (hives) or related to an underlying systemic issue, such as thyroid changes, which can also cause weight gain. Fortunately, fexofenadine itself is rarely linked to weight gain. Please be reassured that these symptoms are highly manageable. I recommend consulting a dermatologist or allergist who can help identify the exact cause, run some simple blood tests if needed, and safely adjust your treatment plan to help you find the relief you deserve.