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Doctor insights on: Is Phenylephrine H Cl An Antihistamine

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Dr. Maxime Cannesson
545 doctors shared insights

Phenylephrine (Definition)

Phenylephrine hydrochloride is a decongestant which is a kind of antihistamine type drug (common ...Read more


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Phenylephrine and ceterizine HCl together okay?

Yes, Phenylephrine: In a nasal decongestant spray can be used for a limited time (see insert) to open nasal passages. Ceterizine is an antihistamine for treating alleric symptoms. ...Read more

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Can a 8 yr old take half tablet of phenylephrine HCL 10mg?

Can a 8 yr old take half tablet of phenylephrine HCL 10mg?

Phenylephrine dose: Phenylephrine dose for 8 year old is 7.5 mg or 3/4 tablet of phenylephrine HCL 10 mg. However tablet has a bitter aftertaste if child is unable to swallow whole. Instead use a pediatric liquid preparation. ...Read more

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Does phenylephrine HCl reduces the side effects of paracetamol if given together?

Does phenylephrine HCl reduces the side effects of paracetamol if given together?

Neither...: Neither medication makes a noticeable difference in the effects of the other medication. Paracetamol or acetominophen (tylenol) generally does not have any noticeable side effects when used properly. ...Read more

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Is it safe to use phenylephrine HCl while breastfeeding?

Is it safe to use phenylephrine HCl while breastfeeding?

Phenylepherine: Because of its poor bioavailibility the drug can be used during breastfeeding, albeit sparingly. ...Read more

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Can diphenhyrdramine HCl 25 mg antihistamine cause a positive urine test?

Can diphenhyrdramine HCl 25 mg antihistamine cause a positive urine test?

For antihistamine: Diphenhydramine is commonly called Benadryl (diphenhydramine) and used as a sleep aid and for treatment of allergies. It should not lead to a positive illicit drug urine test. If urine is testing for antihistamines, it will be positive. ...Read more

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For a possible diangosis of some form of acid reflux, why would an antihistamine such as Hydroxyzine HCL be Rx'ed?

For a possible diangosis of some form of acid reflux, why would an antihistamine such as Hydroxyzine HCL be Rx'ed?

Acid reflux: Symptoms of acid reflux can be from GERD, allergic rhinitis (the reason for treatment trials of antihistamine), or asthma. Your doctor likely felt from what you described that your symptoms may benefit from this medication. If no improvement, just let your doctor know and you can work on figuring out if the other causes are contributing ...Read more

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Is it safe to take Pseudoephedrine and Phenylephrine HCl simultaneously? The max dose of Pseudoephedrine is not curing my congestion. Thanks.

Is it safe to take Pseudoephedrine and Phenylephrine HCl simultaneously? The max dose of Pseudoephedrine is not curing my congestion. Thanks.

NO: They both may raise your blood pressure...pulse and they have similar SIDE EFFECTS!

See an allergist for your congestion!


Hope this helps!
Dr Z ...Read more

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I was prescribed amoxicillin & phenylephrine HCl for sinusitis. Next day, I found out i'm pregnant. Should I continue/finish the prescription?

I was prescribed amoxicillin & phenylephrine HCl for sinusitis. Next day, I found out i'm pregnant. Should I continue/finish the prescription?

Finish amox: Finish the Amoxicillin but stop the phenylephrine. Phenylephrine casues blood vesles to constrict. This will open you nose up but will also decrease placental blood flow. ...Read more

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I took Pseudophedrine & Excedrine at 6 pm and used a nasal spray w/ phenylephrine HCL. It's now around 2:30 AM. Would it be okay to take Nyquil?

I took Pseudophedrine & Excedrine at 6 pm and used a nasal spray w/ phenylephrine HCL. It's now around 2:30 AM. Would it be okay to take Nyquil?

Be careful: Pseudoephedrine and phenylephrine are stimulants and Excedrin contains caffeine, all of which if taken together could cause nervousness jitteriness and possibly palpitations. Do NOT overmedicate. Nyquil can be sedating in certain individuals. ...Read more

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My dr recommended cough syrup with guaifenesin to better CM for helping conceive. Will it still work with phenylephrine HCL 10mg in it ? No dm though.

What?: I might be misunderstanding your question, but are you under the assumption that guaifenesin will help you to conceive a child? Cough syrup, of any kind, will not enhance you chances of becoming pregnant...It will however help your cough... If I'm misunderstanding please repost your question. ...Read more

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Is Loratadine-D & Phenylephrine HCl safe together? I am 37 & on hctz/lisinopril. I took the loaratadine-D thinking it was allergies, but no change.

Is Loratadine-D & Phenylephrine HCl safe together? I am 37 & on hctz/lisinopril. I took the loaratadine-D thinking it was allergies, but no change.

No, not safe: either or both can increase blood pressure, you are under treatment for hypertension as well, please arrange to see your pcp or an allergist to adjust your meds, precribe other meds accordingly, check aaaai.org or acaai.org for an allergist in your area, if you have seen one already and not convinced check a second opinion, it's your right, goodluck ...Read more

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I accidentally used Phenylephrine HCL 0.25% Hemorrhoid gel on my back (instead of hydrocortisone 1%). Should I be alarmed? I'm 5 months pregnant.

I accidentally used Phenylephrine HCL 0.25% Hemorrhoid gel on my back (instead of hydrocortisone 1%). Should I be alarmed? I'm 5 months pregnant.

Should be fine: You should be fine, but you should check with the pharmacist or your OB doc to be sure. Hope this helps! ...Read more

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If my Benadryl (diphenhydramine) contains phenylephrine is it not a good idea to take two tablets for sleep?

If my Benadryl (diphenhydramine) contains phenylephrine is it not a good idea to take two tablets for sleep?

Drop phenylephrine: Find a product that does not contain the phenylephrine. For most people , that med is stimulating and will make you stay awake, not help you sleep. Make sure you also use good sleep hygiene - bedtime routine, minimize distractions around you, warm milk, and consider melatonon for sleep aid rather than more and more benadryl (diphenhydramine). ...Read more

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Hi, I'm having a spreading swollen reaction to what is probably a bed bug bite(s). Cannot get benadryl, (diphenhydramine) will phenylephrine work to help control it?

Hi, I'm having a spreading swollen reaction to what is probably a bed bug bite(s). Cannot get benadryl, (diphenhydramine) will phenylephrine work to help control it?

No: Phenylepherine is a decongestant not an antihistaminic, so it won't control itching or 'allergic reaction'. If you can't get benadryl (diphenhydramine) for whatever reason right now, try having a shower and apply cold compresses till you see a doctor, good luck ...Read more

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My allergy medicine is not working.I am taking cetrizin HCL antihistamine. I also took benadryl (diphenhydramine) and loratadine tablet but not working. At night time while sleeping feel ok but once you get up and move then symptom comes back.

My allergy medicine is not working.I am taking cetrizin HCL antihistamine. I also took benadryl (diphenhydramine) and loratadine tablet but not working. At night time while sleeping  feel ok but once you get up and move then symptom comes back.

See physician: A 51 year old male with allergy symptoms taking cetirizine, benadryl, (diphenhydramine) and loratadine without improvement. See an allergist to determine what you are allergic to and also to determine if there is something else going on, like a sinus infection. Add a nasal steroid spray (OTC Flonase or Nasacort) twice a day as well. ...Read more

Dr. Paul Carter
643 doctors shared insights

Antihistamine (Definition)

Sedating and non-sedating antihistamines prevent and treat allergic reactions, and are ...Read more