I started taking Zyrtec for seasonal allergies. After a month on this drug, I noticed a lump on my forehead. I initially dismissed it as acne. But it grew rapidly. Zyrtec: Quit without itching like crazy. If you take Zyrtec (generic name – cetirizine hydrochloride) daily and have tried to stop, your skin may start to itch. COMMON BRAND NAMES. All Day Allergy, All Day Allergy Children's, PediaCare Children's Allergy, Zyrtec, Zyrtec Children's, Zyrtec Children's Allergy, Zyrtec Children's Hives, Zyrtec Hives Relief, Zyrtec Liquid Gel, Zyrtec Pre-Filled Spoons Cetirizine, sold under the brand name Zyrtec among others, is a second generation antihistamine used to treat hay fever, dermatitis, and urticaria. It is taken by mouth. Effects generally begin within an hour and last for about a day. The degree of benefit is similar to other antihistamines such as diphenhydramine. That is not true. I have been taking zyrtec-d for years and it takes effect within 10-15 minutes and that is with yogurt, toast, coffee, and supplements. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Khanna on benadryl zyrtec interaction: May not be a good idea. What are your symptoms sometimes a doctor may add steroids and other instructions to control severe allergic Rhinitis Cetirizine hydrochloride is a white, crystalline powder and is water soluble. Zyrtec Tablets are formulated as white, film-coated, rounded-off rectangular shaped tablets for oral administration and are available in 5 and 10 mg strengths. Helpful answers from trusted Doctors on causes, diagnosis, symptoms, treatment, and more: Dr. Zacharisen delves into whether or not you should take Allegra and Zyrtec together for symptom relief. Another blood test was also administered and the liver enzymes were still high and hepetitis was ruled out. I maybe take Tylenol once a month, have one margarita a month (if that) and except for the Zyrtec D the doctor suggested for my allergies, birth control, and some vitamins I don't take any other medications. 1 69-5723-00-2 ZYRTEC-D 12 HOUR (cetirizine hydrochloride 5 mg and pseudoephedrine hydrochloride 120 mg) Extended Release Tablets For Oral Use.