Using cetirizine (Zyrtec) and budesonide (Budenase) nasal spray for 14 years is generally very safe. Cetirizine has an excellent long-term safety profile. With long-term budesonide use, it is simply a good idea to have a doctor occasionally check your nasal passages for dryness or mild irritation. The itching you experience in your cheeks and throat when you miss a day is a very common 'rebound' effect; it is simply your original allergy symptoms returning as the medication wears off.

Using cetirizine (Zyrtec) daily is generally safe for chronic hives, but diphenhydramine (Benadryl) can cause drowsiness and is best kept for short-term use. Since your hives have lasted over six weeks, they are considered chronic. While usually harmless, it is important to see an allergist or dermatologist. They can help identify potential triggers and prescribe safer, more effective daily treatments to give you lasting relief.

Moving to a colder, drier climate like Canada can sometimes trigger seborrheic dermatitis due to low humidity and indoor heating. It is completely safe to continue taking Zyrtec (cetirizine) and Becozyme C Forte (B-complex with Vitamin C) there. To help your scalp adjust, try using a humidifier indoors and a gentle, moisturizing shampoo.

Itching five days after a tattoo is often part of the normal healing process, but it may also sometimes indicate a mild skin irritation or sensitivity to the ink or aftercare products, especially if it follows the tattoo pattern. Try not to scratch the area, keep it clean, and use a gentle fragrance-free moisturiser and a cool compress to help soothe the skin. An over-the-counter antihistamine can help reduce the itching if it is bothersome. Please see a doctor promptly if you notice worsening redness, swelling, pain, discharge, or any fever.

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.

Cetirizine (Zyrtec) has a wide safety margin. The sleepiness you are seeing is a normal, temporary side effect of the slightly higher dose and will wear off as the medication leaves her system. You should skip her next dose for today to let her body process the medicine. Keep her comfortable, monitor her breathing, and ensure she is waking up to feed. For peace of mind, please contact your pediatrician or local poison control center for a quick check-in.