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Doctor insights on: Benadryl 12 Hour

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Can you take 25mg Benadryl 12 hours after taking regular allegra? I take toprol (metoprolol) XL 50 mg for blood pressure

Can you take 25mg Benadryl 12 hours after taking regular allegra? I take toprol (metoprolol) XL 50 mg for blood pressure

Benadryl (diphenhydramine) Use: It should be "safe" unless you get too much sedation. Ask your primary care doc then take it only at night when you need to sleep anyway.

There are numerous other (possibly more effective) options as well.

Check with an ENT or allergy doc. ...Read more

Dr. John Chiu
1,047 Doctors shared insights

Diphenhydramine (Definition)

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


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Is it safe to give child Benadryl (diphenhydramine) 12 hours after claratin?

Is it safe to give child Benadryl (diphenhydramine) 12 hours after claratin?

Combination Tx?: Yes, Benadryl (diphenhydramine) and claritinare both antihistamine but different classes. They have different side effects with Benadryl (diphenhydramine) having more sedation. Because of this Benadryl (diphenhydramine) is best given before bed and Claritin given in the morning. Do no give at the same time. Allergy symptoms (usually allergic nose or hives) can be better controlled this way. As with any medications do not give for prolonged time. ...Read more

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If I took an allegra at 11am, can I take Benadryl (diphenhydramine) 12 hours later?

If I took an allegra at 11am, can I take Benadryl (diphenhydramine) 12 hours later?

Yes: Benedryl has some benefits as a really tenacious antihistamine that binds well with histamine & is very effective in that work. Its drawback is sedation which occurs because it enters the brain & messes with messages between nerve cells. You can take benedryl along with a non-sedating antihistamine as long as you can handle the side effects. ...Read more

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Well, I took Benadryl (diphenhydramine) about 12 hours ago and I was wondering, may I take zyrtec?

Well, I took Benadryl (diphenhydramine) about 12 hours ago and I was wondering, may I take zyrtec?

Antihistamines: Yes you can, but you really should have some doctor guidance with your medications, because you did not mention what symptoms you are treating with the antihistamines and they may not be the ideal medication if you are not responding to one and need to add another. Talk to your doctor. ...Read more

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Why does Benadryl say not to take more than 6 doses in 24 hours?

Why does Benadryl say not to take more than 6 doses in 24 hours?

1 dose = 50 mg: And you shouldn't exceed 300 mg / day, divided every 4-6 hours, more than that you suffer more side effects as CNS depression and the like, also the drug may interact with other foods or medicines you are on, or if you have liver or kidney disease you should use less doses, so read the labels carefully, good luck ...Read more

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Is 350 mg of Benadryl (diphenhydramine) in 6 hours too much to take?

Is 350 mg of Benadryl (diphenhydramine) in 6 hours too much to take?

Yes: As an antihistamine, recommended doses for adults is 25-50 mg Diphenhydramine every 6-8 hours, not to exceed 50-100 mg every 4-6 hours. ...Read more

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Can Benadryl (diphenhydramine) build up in your system even if you are taking it every four to six hours and cause problems? I

Can Benadryl (diphenhydramine) build up in your system even if you are taking it every four to six hours and cause problems? I

Should be ok: Benadryl (diphenhydramine) is relatively short acting so a dose every 4 to 6 hours should not cause problems. If symptoms persist beyond a week, you should probably consult your health care professional since further treatment may be necessary. ...Read more

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been taking 175mg of benadryl (diphenhydramine) every 4 hours yesterday I felt like I was overdosing how long till it's all out of my body?

been taking 175mg of benadryl (diphenhydramine) every 4 hours yesterday I felt like I was overdosing how long till it's all out of my body?

Definitely overdosing: Please call poison control center in your area, meanwhile don't take anymore benadryl (diphenhydramine) or any other antihistaminic, if drowsy or any abnormal symptom go to ER, with normal dosing it clears in less than a day, not sure how long with such high dose ...Read more

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I am now 95 pounds & I took 10 25mg Benadryl (diphenhydramine) pills and I think it's been two hours why am I not high. How long does it take to feel the high?

WILL MAKE YOU SICK: It is not a good idea to overdose on 250mgm of Benadryl (diphenhydramine) to get high
it can make you sick. It will cause extreme sleepiness, confusion, weakness, ringing in the ears, blurred vision, large pupils, flushing, fever, shaking, insomnia, hallucinations and possibly seizures
go to er if you have any of the serious symptoms.
Please if you have drug problem consult a therapist or your doctor. ...Read more

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I was wanting to know since I took allergra (12 hr)about 6 hours ago if it's safe to take Benadryl (diphenhydramine)? I can't stop the drainage from keeping me awake!

I was wanting to know since I took allergra (12 hr)about 6 hours ago if it's safe to take Benadryl (diphenhydramine)? I can't stop the drainage from keeping me awake!

You can, but: Be cautious, both are antihistamines, and you don't want to overdose, start with lower dose benadryl (diphenhydramine), (diphenhydramine) later stick to either benadryl (diphenhydramine) or fexofenadine (allegra). If you don't improve in a day or two, see your doctor, caution if Benadryl (diphenhydramine) makes you drowsy, don't drive, wish you wellness ...Read more

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I took one Benadryl 2 hours ago can I take a dose of NyQuil?

I took one Benadryl 2 hours ago can I take a dose of NyQuil?

2 young 4 HealthTap: HealthTap docs are asked not to address questions posed by individuals under 16. As an aside, however, insomnia at your age deserves medical attention, not shotgun OTC agents. ...Read more

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What are the effects of taking Benadryl (diphenhydramine) and zyrtic and hour and a half apart?

What are the effects of taking Benadryl (diphenhydramine) and zyrtic and hour and a half apart?

Just drowsy: Worsens Benadryl's sleepy effects. Not so much if on Zyrtec (cetirizine) daily a long time. Beware driving/ machinery. ...Read more

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I have my 8 year old Desylum at 8 is it ok to give her Benadryl (diphenhydramine) 7 hours later??

I have my 8 year old Desylum at 8 is it ok to give her Benadryl (diphenhydramine) 7 hours later??

OK: It is safe. If his symptoms don't resolve see his doctor. It sounds like he is needing a fair amount of over the counter medications. All the best. ...Read more

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I took a Benadryl (diphenhydramine) and fell a sleep. It must of wore off because I woke up an hour and a half later, can I take another one?

I took a Benadryl (diphenhydramine) and fell a sleep. It must of wore off because I woke up an hour and a half later, can I take another one?

Read drug label: Please take medications as directed. Instructions are usually printed on the ingredient label. You can always take another one but not until specified amount of time has elapsed. ...Read more

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Took claritin-d over 12 hours ago can I take one benadryl (diphenhydramine)?

Took claritin-d over 12 hours ago can I take one benadryl (diphenhydramine)?

Yes: Benadryl (diphenhydramine) can make you drowsy, but I would not expect any untoward effects from a "non-sedating" antihistamine like Claritin in combination with benadryl (diphenhydramine). ...Read more

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Taking 120 mg pseudoephedrine every 12 hours, 10 mg loratadine in morning, and one Benadryl (diphenhydramine) at bedtime, is this ok?

Taking 120 mg pseudoephedrine every 12 hours, 10 mg loratadine in morning, and one Benadryl (diphenhydramine) at bedtime, is this ok?

Medication question: It is okay to take the pseudoephedrine with the loratadine. However, the nighttime Benadryl (diphenhydramine) would be considered a duplication of the loratadine which is a 24 hour medication. Without knowing more about your medical history, I would not suggest that you do that. Instead, I would suggest discussing the optimum management of your medications with your doctor. ...Read more

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I took reactine six hours ago can I now take benadryl?

Yes: Antihistamine is safe even with 4x the average daily dose. The major side effects would be dry mouth and drowsiness (the latter much less common if one uses the non-sedating type). I believe reactine is equivalent to Claritin (loratadine) in the us. Short answer- it is ok. ...Read more

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Can I take Benadryl if I have taken 25 mg spironolactone 2 hours ago?

Can I take Benadryl if I have taken 25 mg spironolactone 2 hours ago?

Yes: No interaction, good that you asked, always exercise caution with multiple medications ...Read more

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Is safe if I take Benadryl (diphenhydramine) six hours after take zyrtec?

Is safe if I take Benadryl (diphenhydramine) six hours after take zyrtec?

Should be ok: While taking Benadryl (diphenhydramine) after zyrtec should be ok, it would be even better to know the underlying trigger to allow less medication usage. An allergist could determine why symptoms are not controlled with less medication. ...Read more

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I had zyrtec about 6 hours ago. Can I take Benadryl (diphenhydramine) now?

Yes you can: Yes you can if your symptoms are not controlled with zyrtec (cetirizine) alone for short period. ...Read more

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If I had a drink 6-7 hours ago is it safe to take Benadryl (diphenhydramine)?

Don't exceed dosage: Probably safe if you just had one drink, and not exceeding recommended dose for benadryl, (diphenhydramine) don't drive as well, good luck ...Read more

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After how many hours of taking claritin, can I take benadryl (diphenhydramine)?

No wait necessary: While both are antihistamines, only Benadryl (diphenhydramine) will make you drowsy. So as a "one-time" dose, there should not be any significant problems. ...Read more

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Took 2 reactine e.s 24 hours ago. Safe to take 2 benadryl (diphenhydramine) now?

Took 2 reactine e.s 24 hours ago. Safe to take 2 benadryl (diphenhydramine) now?

Yes: As long as you are aware that this may make you drowsy- perhaps that's what you want in the first place. ...Read more

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Is it safe to take Benadryl (diphenhydramine) if I took two 10mg loratadine tablets a few hours ago?

Yes: The two are compatible in the short term. Benadryl (diphenhydramine) is potentially sedating, so caution is advised. By the way, studies show the regular adult dose of loritadine is 10 mg and 20 mg is not found to be any more effective. ...Read more

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I sampled a little bit of alcohol a few hours ago, is it safe to take some benadryl (diphenhydramine)?

Probably OK: If you have had less than 2 drinks, it is probably ok to take a Benadryl (diphenhydramine) knowing that it may make you more drowsy. I certainly would not advise driving your car home however until you know for sure how much the combination may affect your mental alertness. ...Read more

Benadryl (Definition)

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