Costco boasts a lot of great deals, but they might not all be as good as they seem. Read on to see our picks for 28 deals at Costco that are actually worth it. Per the US FDA package insert for Zyrtec (cetirizine hcl) 10mg tablets: adults and children 12 years and older should not take more than the 24hr recommended maximum dose of 10mg. When you’re muddling through your allergies, all you want is an answer. Or maybe more than one. Here’s a quick list of responses to all your important questions about our products and what might be causing your allergies. I continued taking Zyrtec for the next few years thankful for the relief. But it was not until recently that I began to research my symptoms again because it seemed to only be getting worse. What other drugs will affect Zyrtec? Taking Zyrtec with other drugs that make you sleepy can worsen this effect. Ask your doctor before taking a sleeping pill, narcotic medication, muscle relaxer, or medicine for anxiety, depression, or seizures. • Stop when you’re tired or feeling overwhelmed. One of the in looks right now is the Minimalistic look which basically mean little is more. Amblyopia is cortical visual impairment from abnormal eye development-most often as a result of strabismus. If your allergy is particularly bad then yes you can take them on the same day, as there are no known interactions. This is a therapeutic duplication and it is usually recommended to take only one antihistamine at any time, however if you have been prescribed to take both together then it is appropriate. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Machtinger on can you take zyrtec and flonase together: they are both antihistamines and would not be useful or safe taken together! Hope this helps Dr z By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. 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.