You gave him about 7 mg of cetirizine (Zyrtec), which is slightly higher than the typical dose for a one-year-old, but it is highly unlikely to cause any serious harm. The most common side effect is drowsiness, which explains why he is sleeping so peacefully right now. For now, let him rest, but check on him periodically to ensure he is breathing normally. Once he wakes up, offer him some water. For your peace of mind, you can call your pediatrician or Poison Control, but please rest assured he is safe.

Since your current routine of cetirizine (Zyrtec), montelukast (Singulair), and allergy shots isn't quite clearing it, you have a few safe options to discuss with your doctor. Using a saline sinus rinse daily can physically wash away stubborn mucus. Additionally, an expectorant like guaifenesin (the active ingredient in Tussin DM, which you tolerate) can help thin the mucus so it drains easier. Your doctor might also consider a prescription ipratropium bromide nasal spray, which specifically targets excess dripping. Please consult your physician to safely tailor these options to your needs.

If you have had allergic rhinitis for a long time, it is common for symptoms like sneezing, a runny nose, and itching to come back when you stop medicines such as Cetirizine, because these medicines control the allergy but do not cure it permanently. For long-term control, doctors often recommend using a nasal spray (usually a mild steroid spray) regularly, as it works directly inside the nose and helps reduce inflammation over time. Saline (salt water) nasal rinses can also be very helpful in clearing allergens and soothing the nose. At home, try to reduce exposure to triggers like dust, smoke, strong perfumes, and pollen by keeping your living space clean, using dust-proof covers, and avoiding outdoor exposure during high pollen times. Washing your face and changing clothes after coming from outside can also help. Staying well-hydrated and using a humidifier in dry weather may give additional relief. If symptoms are severe or persistent, your doctor may suggest allergy testing or long-term options like immunotherapy (allergy shots or drops), which can reduce sensitivity over time. With the right combination of treatment and lifestyle changes, most people can keep their symptoms well under control.

It is generally safe and very appropriate to use Nasonex (mometasone) and Zyrtec (cetirizine) together. Since you have finished your course of Otrivin (xylometazoline), transitioning to Nasonex is a great step; Otrivin can cause rebound swelling if used for more than a few days, whereas Nasonex safely reduces long-term tissue inflammation. Zyrtec will further help if allergies are contributing to your blockage. Please spray Nasonex pointing slightly outward, away from the middle nasal wall. If your symptoms do not improve within two weeks, or if they worsen, please consult your doctor.

You are already doing a wonderful job managing her comfort with cetirizine (Zyrtec) and acetaminophen. To help her feel better, focus on keeping her hydrated with small, frequent sips of water, diluted juice, or warm broth. A cool-mist humidifier in her room and saline nasal drops can ease her congestion and soothe her throat. Offer soft, cool foods like yogurt or applesauce, but do not force her to eat. Since she has no fever, she is likely fighting off a mild cold. Keep offering comfort, and contact your pediatrician if her symptoms worsen.

It is completely normal for a baby's cold to last 10 to 14 days. At one month old, babies have very narrow nasal passages that easily clog, especially when lying flat at night, causing that noisy breathing. While you are using Sinarest AF and Zyrtec, these medications can sometimes dry out nasal secretions, making them thicker and harder to clear. To help her breathe more comfortably, try using simple saline nasal drops and a gentle bulb syringe to clear her nose before feeds and sleep. Since she is so young, please consult her pediatrician to safely review these medications and ensure she is recovering well.