Doctor insights on:
Does Allegra D Cause Drowsiness
Fexofenadine is an antihistamine which is used to treat allergies such as hayfever, and hives. It can be taken once or twice a day. It is a second generation antihistamine and does not cause as much drowsiness as other antihistamines such as Diphenhydramine (benaryl) or chlorpheniramine. Always be careful about drowsiness with any antihistamine especially if driving ...Read more
Enters the brain: The molecular structure of benedryl allows it to enter the brain where it can interfere with the chemicals that transfer messages between brain cells. In most people it causes drowsiness, in some it will cause the opposite. Newer antihistamines like loritadine & fexofinadine have molecular structures that prevent entry into the brain, so they don't make you drousy. ...Read more
Yes: Claritin is a second generation antihistamine which causes much less drowsiness than first generation antihistamine, like benadryl (diphenhydramine). The number of people who feel drowsy on Claritin is so low that it is labeled "non-drowsy". But each of us is unique. I have plenty of patients who feel drowsy on claritin, especially petite women. ...Read moreSee 1 more doctor answer
Complex: Histamine is a wake promoting neurotransmitter in the brain. Older antihistamines like Benadryl (diphenhydramine) cross into the brain and block this center allowing for drowsiness to occur. The newer antihistamines like alleges, claritin, zyrtec do not cross as easily and are less likely to promote drowsiness. ...Read moreSee 1 more doctor answer
Yes, esp w/ Zoloft!: Combining these medications can increase the risk of a rare but serious condition called the serotonin syndrome - definitely check with your doctor! it can be a bad interaction - take it seriously. Good luck - i hope it's nothing and you feel better soon, but do check it out. ...Read moreSee 1 more doctor answer
Will taking benadryl (diphenhydramine) everyday lead to more histamine receptors? does being benadryl (diphenhydramine) everyday cause an opposite reaction and cause more allergies?
No: Not the case, but you may develop tolerance to the drug, meaning you have to take more to get the same result ...Read more
Does Chlorpheniramine work exactly as doxylamine & diphenhyhdramine? Some say no drowsiness with Chlorpheiramine. Some say drowsiness. ??
Very similar but: Chlorpheniramine is less drowsy-inducing than the ones you mentioned in the recommended dose but it is not totally non-sedating. ...Read more
Does vistaril (hydroxyzine) have side effects and does it help anxiety symptoms I'm worried vistaril (hydroxyzine) cause dizziness?
Vistaril (hydroxyzine) & anxiety: All medications have side effects, every one. Vistaril (hydroxyzine) causes dry mouth, blurry vision and can also cause light headedness and dizziness. You should consult with your physician about this. Vistaril (hydroxyzine) is an antihistamine and can help with anxiety, but there are better antianxiety medications. See a Psychiatrist or Psychologist who knows something called Cognitive Behavioral Therapy for anxiety. ...Read more
Highly unlikely: Amoxicillin usually does not cause hyperactivity or drowsiness. With that being said, any medication can cause any type of reaction in anyone. An interaction with another drug is also possible. Ask your doctor or pharmacist to review all of your medications. ...Read moreSee 1 more doctor answer
Yes but why?: Claritin (loratadine) d is a non-sedating antihistamine-decongestant combination used to treat allergies. Nyquil is used to treat common cold symptoms. It also may contain an antihistamine and decongestant, but the antihistamine is often sedating. This would not be something to use for allergies. Thus, using both would be a 'strange' combination. ...Read more
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