Top
30
Doctor insights on: Benefits And Side Effects Of Antihistamines

Share
1

1
I wish to know what are the side effects of antihistamines?

I wish to know what are the side effects of antihistamines?

Tiredness: Mostly they cause tiredness but if you have a prostate problem, be careful
don't drink and take benedry and don't drive or operate heavy machinery! ...Read more

Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


2

2
How can we reduce or eliminate the side effects of antihistamines?

How can we reduce or eliminate the side effects of antihistamines?

Try different brands: The side effects of antihistamines (dry mouth, tiredness. Etc) vary from drug to drug. For example Benadryl (diphenhydramine) OTC is more likely to make you sleepy (in fact for some its a safe sleeping pill) whereas the more recent additions to the OTC antihistamine group (eg Claritin) have less sleepiness (but more dry mouth) Each Person reacts differently to these drugs Try some
Hope this helps
DR Z ...Read more

3

3
What are the side effects of antihistamines and what can we do about each?

What are the side effects of antihistamines and what can we do about each?

3rd generation AH: Older antihistamines (AH) like Benadryl, (diphenhydramine) Atarax, Periactin caused drowsiness and dry mouth in at least 30% of the people. Weight gain in another potential side effect.
Newer antihistamines like Zyrtec, Xyzal causes drowsiness in about 10% of the people
3rd generation AH like Allegra and Claritin are not expected to cause drowsiness in 95% of the people. ...Read more

5

5
What are the side effects of using antihistamines?

What are the side effects of using antihistamines?

Few: There are no long term adverse effects from using antihistamines. Short term sides effects are typically from older antihistamines such as Benadryl (diphenhydramine) that can cause drowsiness and delayed reaction time. New generation antihistamines such as claritin, clarinex, zyrtec, xyzal and Allegra are generally very well tolerated. No dependence and few if any drug interactions. ...Read more

6

6
Is antihistamine bad for asthma. If not what is the safest antihistamine to take with minimum side effects?

Is antihistamine bad for asthma. If not what is the safest antihistamine to take with minimum side effects?

No: Antihistamines are not bad to take if you have asthma, however if you're using them to treat asthma symptoms this is not appropriate. Antihistamines are for itchy, sneezy symptoms secondary to allergies. Asthma medications include albuterol and daily inhaled steroids. Non-sedating antihistamines like Claritn, Zyrtec, and Allegra (fexofenadine) have relatively equal efficacy and safety profiles ...Read more

7

7
What are long term side effects of diphenhydramine antihistamines and do they lose effectiveness over time? K

Minimal: Diphenhydramine is the active ingredient in Benadryl (diphenhydramine) and has been around for a very long time. Like most antihistamines, there is not believed to be long term side effects. Losing effectiveness is less well studied, but with ongoing use there could be some development of tolerance or it could be that you are still being exposed to an allergen and that is why symptoms are not controlled. ...Read more

8

8
Can a non drowsy antihistamine that had no side effects that I've noticed hurt you if u take 2 pills in 24hrs instead of 2?

Can a non drowsy antihistamine that had no side effects that I've noticed hurt you if u take 2 pills in 24hrs instead of 2?

No: Which antihistamine? Why using it? Sometimes, for chronic urticaria, cetirizine [Zyrtec] is dosed at 3 a day. The official dose of these is 1 a day. Allegra and claritin are also sometimes used at double or triple dose. It is best if you consult a Dr before you take doses higher than usual. ...Read more

10

10
Is it possible to get "rebound" side effects from stopping an antihistamine? I've been taking one for 5 months, and have sinus problems since stopping

You probably need it: Rebound to cessation of antihistamines would be unusual, . If you took a combination antihistamine/decongestant, it would be more common. However, you had been taking an antihistamine for 5 months. Had you taken it for a nasal problem? My hunch is that your nasal/sinus problem, for which you had taken the antihistamine in the first place, recurred the moment you stopped it. ...Read more

11

11
Is there any side effects when you take antihistamines for a longer period than a month?

Unlikely: Antihistamines are generally safe to take for prolonged periods of time, as long as you're taking the proper dose. These medicines are notorious for causing drowsiness, although some over the counter antihistamines are non-drowsy. ...Read more

12

12
Is there any side effects when you take antihistamines like atarax (hydroxyzine) for a longer period?

Is there any side effects when you take antihistamines like atarax (hydroxyzine) for a longer period?

No: Even though it is an effective sedative, hypnotic, analgesic, and tranquilizer, it shares almost none of the abuse, dependence, addiction, and toxicity potential of other drugs used for the same range of therapeutic reasons. ...Read more

13

13
Long-term side effects from taking bilastine 20mg 1x per day (antihistamine) for chronic rhinitis? Need it to help dry up post-nasal drip.

Probably safe: There is no major side effect from taking this type of antihistamine long term (not yet approved in US) but a small percentage of people may experience drowsiness and weight gain. It may potentially impact memory function among people with memory impairment. ...Read more

14

14
Newer antihistamines are not anticholinergic. So why are side effects like constipation often reported for claritin (loratadine) for example?

Newer antihistamines are not anticholinergic. So why are side effects like constipation often reported for claritin (loratadine) for example?

Less anticholinergic: Newer generation antihistamines like Claritin (loratadine) still have anticholinergic properties, but to a much lower degree compared with first-gen. Some patients remain highly sensitive to associated side effects. ...Read more

15

15
Side effects of benadryl (diphenhydramine)?

Side effects of benadryl (diphenhydramine)?

Dried up and sleepy: Why would you want to take benadry (the brand name for diphenhydramine) long term? Fagetaboutit. Side effects are drying of mucous membrane, drowsiness, fatigue, difficulty urinating... ...Read more

16

16
Strange side effects of benadryl (diphenhydramine)?

Strange side effects of benadryl (diphenhydramine)?

Several: The most common side effect of taking too much Benadryl (diphenhydramine) would be excessive drowsiness. Other possible side effects include dizziness, headache, constipation, urinary retention, and heart palpitations. ...Read more

17

17
What are side effects of benadryl (diphenhydramine)?

Most common side: Effects of Diphenhydramine are drowsiness, dry mouth, constipation, blurry vision, thickenened secretions, impaired coordination. There is a big laundry list of the usual anti choline this side effects, but those are the most common. People use it to sleep or for itching most often. ...Read more

19

19
What are some side effects of Benadryl (diphenhydramine) on your body?

Benadryl (diphenhydramine) can cause: Sedation the nxt day (due to its long1/2-life). Can cause decreased alertness, diminished cognitive function, delirium, dry mouth, blurred vision, urinary retention, constipation, increased intraocular pressure/glaucoma, & many other anticholinergic agent. Ill effects in disease specific states & drug-drug interaction are other concerns. Generally safe when used in moderation for the right purpose. ...Read more

20

20
What are the side effects of taking too much benadryl (diphenhydramine)?

What are the side effects of taking too much benadryl (diphenhydramine)?

Several: The most common side effect of taking too much Benadryl (diphenhydramine) would be excessive drowsiness. Other possible side effects include dizziness, headache, constipation, urinary retention, and heart palpitations. ...Read more

24

24
I had two vodka tonics (very carefully measured at one shot each) and then, without thinking about the side effects, took a 25 mg Benadryl. What to do

Relax: Just don't drive, don't stay alone, no more benadryl for now and no more alcohol. It may take up to 12 hours for your body to get rid of both, best wishes ...Read more

26

26
Can a 40 year old healthy male take tramadol with benadryl (diphenhydramine)? Any side effects?

Can a 40 year old healthy male take tramadol with benadryl (diphenhydramine)? Any side effects?

Yes if prescribed: Tramadol is a strong pain relieving medication and Benadryl (diphenhydramine) is an antihistimine (usually available over the counter). Both can cause drowsiness, even more so if taken in combination. Should be relatively safe for a healthy 40 year old male- provided that the tramadol was prescribed by your health care professional. ...Read more

27

27
Is it ok th take Benadryl (diphenhydramine) and 1mg of melatonin before bed without side effects?

Is it ok th take Benadryl (diphenhydramine) and 1mg of melatonin before bed without side effects?

Side effect possible: Benadryl (diphenhydramine) and melatonin could make a purpose MORE tired and sleepy which could translate into being groggy in the morning thought for all practical purposes, 1 mg. Of melatonin is an extremely small amount. Then, again, I don't know anything about your build, your weight, other medications you are taking, etc. Etc. So perhaps FOR YOU....1 mg. Of melatonin is more than what it may sound. ...Read more

28

28
What do I do? I've taken benadryl, (diphenhydramine) unisom, & pamprin? Is there serious side effects?

What do I do? I've taken benadryl, (diphenhydramine) unisom, & pamprin? Is there serious side effects?

How much???: How much of these did you take? Were you trying to overdose? Since you've given no information about amounts, you need to go to the emergency room now. Call 911 if you need to -- do not drive yourself. All 3 could be sedating, but the pamprin contains acetominophen which can be toxic to your liver if enough if consumed. Please get help now. ...Read more

30

30
Can Benadryl (diphenhydramine) usage over a long term produce cause similar sexual side effects that ssris produce?

Unlikely: Ssri side effects are very well established where as antihistamine use and sexual side effects are not that well established. I would be more concerned about long term use of antihistamine and the reasons for it. Are you using it for sleep, allergy? Consult a psychiatrist as theses may be residual sx of depression and treatment may need to be optimized. ...Read more

Dr. Paul Carter
648 Doctors shared insights

Antihistamine (Definition)

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