Top
10
Doctor insights on: Contact Antihistamine

Share
Dr. Paul Carter
593 doctors shared insights

Antihistamine (Definition)

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


2

2
I started to use Chloropyramine topical cream for releiving the itching from contact dermatitis on chest. is it good antihistamine cream for it?

I started to use Chloropyramine topical cream for releiving the itching from contact dermatitis on chest. is it good antihistamine cream for it?

Oral is better: It is not uncommon for topical application of antihistamines to cause sensitization reactions and to develop allergy to the antihistamine. A batter choice is to use the antihistamine orally and to apply calamine lotion to the area, If it is a true contact dermatitis the only effective way to eliminate the rash is with topical steroids. ...Read more

See 1 more doctor answer
3

3
If a red, itchy rash with no contact triggers improves with antihistamines (claritin or low dose doxepin) does that mean it is probably eczema?

If a red, itchy rash with no contact triggers improves with antihistamines (claritin or low dose doxepin) does that mean it is probably eczema?

Itchy rash: Antihistamines control the itch, whether it is eczema or not, the mechanism of itching is common to a number of rashes and antihistamines only help with the end result but not with the cause. To have a proper diagnosis, you need to have yourself evaluated by a dermatologist or allergist. ...Read more

4

4
Can i take one antihistaminic at moorning and another one at nigt? for alergic reactions.

Can i take one antihistaminic at moorning and another one at nigt? for alergic reactions.

Yes but...: Antihistamines can be taking twice a day safely if required but there are other treatments available. If by allergic reaction you are referring to seasonal allergies, the gold-standard therapy is daily nasal steroid sprays and/or antihistamine nasal sprays. Nasal saline rinses, avoidance measures, and if refractory to treatment, allergy shots can also be helpful. See an Allergist for more details. ...Read more

5

5
What is the highest dosage of antihistamine that one person can take at one time?

What is the highest dosage of antihistamine that one person can take at one time?

Antihistamines: Safety of high dose medications is often unknown. Our experience comes from case reports of persons who intentionally or accidentally consumed unusually excessive quantities. When Claritin was first investigated, safety studies were done at 40 mg (4 times the current recommended dose). We take 10 mg because effectiveness is not significantly different between 10 mg and 40mg. ...Read more

See 1 more doctor answer
6

6
When should you take an antihistamine?

When should you take an antihistamine?

Multiple reasons: Depending on the type of antihistamine used they can be used to treat things such as allergy symptoms, nausea, dizziness, motion sickness, anxiety, itching, and difficulty sleeping. ...Read more

See 1 more doctor answer
7

7
Can i die by taking too many antihistamine tablets?

Can i die by taking too many antihistamine tablets?

Taking lethal over: Dose would do that. Lethal overdoses of antihistamines are rare. Are you considering taking an overdose of antihistamines? If so, please get help right away. You can use national suicide hotlines 24/7 at 1-800-suicide (1-800-784-2433) or 1-800-273 – talk (1-800-273-8255). If you have accidentally taken too many antihistamines please contact 1-800-222-1222 (poison control hotline). Take care. ...Read more

8

8
What is the average time needed for an antihistamine to begin to work?

What is the average time needed for an antihistamine to begin to work?

45-90 minutes: Antihistamines taken by mouth begin to work in about an hour but may take longer if you've just eaten. Antihistamine nasal sprays (astepro, patanase) begin to work in 30 minutes. An antihistamine injection, usually diphenhydramine, sometimes given for a severe allergic reaction or anaphylaxis begins to work in a few minutes. ...Read more

See 1 more doctor answer
9

9
What is the best OTC antihistamine?

OTC antihistamines: The second generation zyrtec, allergra or Claritin are comparative. None are perfect. Zyrtec is slightly more likely to make you tired ot sleepy. Often one works a little better than another and i adise you to test all three. ...Read more