Doctor insights on:
Claritin How Long To Take Effect
Up to 1 hour: Claritin (loratadine) can work relatively quickly in most people. That is, it usually works within 30 minutes. However, in some people it may take up to 60 minutes to have its full effect. If it is not working within that time, or if the duration of effect becomes less and less, seeing an allergy specialist for allergy testing would be recommended as other treatments may be more effective. ...Read more
Pretty Quickly: Most antihistamines will start to work within the first 30-40 minutes. ...Read more
Prob ok: Antihistamines have been around for decades, and certainly many more potent than loratadine. They say worldwide the most common drug taken is diphenhydramine, mostly for the sedative properties (as a sleep aid). Antihistamines can affect certain types of glaucoma, and accentuate urine retention in those with prostate issues and dry mucous membranes, but usually not so much with loratadine per say. ...Read more
3 days to reach peak: Claritin (loratadine) (loratidine) takes 3 days to reach a steady state, so it could take that long for it to work on hives. Other non-drowsy antihistamines are a better choice: Allegra (fexofenadine) reaches peak effect within 2 hours and Zyrtec (cetirizine) reaches peak effect in 1-2 hours. If you see no benefit at all within 5 hours of taking these, they probably will not work for you. ...Read more
How many weeks does it take for claritin (loratadine) 10mg to work? How long should I give it a try before deciding to switch to a different antihistamine?
Try for a few days: Antihistamines begin to work in less than an hour but a person may not feel significant relief for a few days. Claritin tends to be one of the weaker non-drowsy antihistamines. Others available without a prescription are Zyrtec, Allegra and Xyzal. If antihistamines are still not working then an evaluation by an allergist can be helpful to determine the cause of symptoms ...Read more
See details: I would not avoid taking them in the same day. Choose one or the other. ...Read more
My dr prescribed Claritin (loratadine) for a skin reaction, but its no longer effective. Can I take a second dose so I can get a decent night's sleep?
Claritin (loratadine): Rather than doubling the dose of Claritin (loratadine) it may be wiser to try a different antihistamine until you can get back in and be seen. Not knowing what the condition is it is difficult to know exactly what to do. I suspect this may be chronic hives. There are certainly other things to do if it is. You may want to see an Allergist, ...Read more
I am 14 weeks pregnant I took a Claritin D just once is that ok as long as I don't take it again or can it hurt baby?
You're just fine: Claritin D won't hurt your baby even more than once, claritin (loratadine) is category B, while D (pseudoephedrine) is category C, with pregnancy, B is safer than C though, but both are safe, confer with your obstetrician on the next prenatal care visit, wish you a healthy pregnancy and a healthy baby ...Read more
Is it safe to take claritin-d every day? Are there long term side effects and what does pseudoephedrine interact with, if anything?
Allergies: In general, it it safe to take antihistamines everyday for allergies. Claritin-d includes the decongestant as you mentioned, and I tend to avoid that for people on a long term basis. It increases vasoconstriction and this has a variety of effects including more work for the heart and elevated blood pressure. There are other medications that can help with congestion. See ent/allergist. ...Read more
Can allergies make you swell up and retain water? I notice when I take Claritin it lasts longer than Benadryl (diphenhydramine) and im not retaining fluids as much
Unexpected: If you mean swelling which lasts hours at a time, it is not from water retention and is called angioedema. Water retention tends to be most noticeable at the legs and ankles and would dent if you press your finger against the area. Claritin does not relieve water retention but may reduce angioedema and yes it has a longer duration of action than benadryl (diphenhydramine). ...Read more
I have had dry mouth and little chest pains side effects from loratadine for a day and a half, how long will it take for the side effects to leave?
8 hour half life: The half life is 8 hours, so within several days there should be hardly any active metabolites of this medicine in your system. Best wishes. ...Read more
Can I take 10mg of loratadine and use fluticasone nasal spray? I need immediate relief from these horrible allergies! Got a long day outside on tap!
Yes: Loratidine and fluticasone nasal spray are effective when used together. If this is not effective, adding an intranasal antihistamine (rx), such as azelastine (astelin) or olpatadine (patanase) is an option. Dymista is a combination of fluticasone and azelastine and works quickly. None of these products should adversely affect asthma or your current medications. ...Read more
If I take zertec for a long period 10mo then switch to Claritin (loratadine) can my sinuses become dependent on zyrtec and over produce mucus w/o zyrtec in system?
Unlikely: While the "good" effect of zyrtec (cetirizine) will be gone in several days, there is no known problem of "rebound" or worsening symptoms when stopping oral antihistamines. More likely, is the continued exposure to the allergens. Here is where an allergist will be able to assist. ...Read more
How long is it safe to take Claritin D? D seems to be the only thing help chronic post nasal drip and fluid in ears. On allergy shots but slow progress.
BP Concerns: The decongestant in Claritin (loratadine) D can be helpful for acute facial pain/pressure and congestion but has side effects which can be significant. If you have a history of blood pressure issues or other cardiac problems I would not recommend. Consider talking with Allergist about other possible treatment due to refractory disease. Drying agents like ipratroprium bromide sprays and methscapolomine can help ...Read more
Yes: It is safe to take those mess together ...Read more
See your doctor: If your symptoms are not controlled with a normal dose, you should be evaluated for other causes and treatments. 2nd-generation antihistamines like Claritin (loratadine) are usually very safe, and we sometimes recommend doses higher-than-normal doses for certain conditions. But these conditions are best managed with the help of your doctor--see your doctor before taking more than the recommended dose. ...Read more
Yes, but why?: Studies of loritadine show the medication is well tolerated at twice the recommended 10 mg dose. However, the same studies show no added benefit of the double dose in symptom relief over the regular dose schedule. ...Read more
Yes: Claritin (loratadine) and Zyrtec (cetirizine) are pregnancy category B medications which means that animal reproduction studies have failed to demonstrate a risk to the fetus, but there are no adequate and well-controlled studies in pregnant women. That said, I frequently use these medications with my pregnant patients. Allegra (fexofenadine) is category C so avoid this medication if possible. ...Read more
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