How long does Benadryl Allergy last in the body? I took two pills, and I am 15 and 135 pounds. :]?

I took them at 12:15, I want to know how long I will be tired for. Will i be tired when I wake up? and if so, for how long? Holla !

15 Answers

  • dang, you took TWO pills? I’m surprised you’re not still asleep. I hate Benadryl. Taking one pill knocks me out for the day. Of course my allergies don’t bother me…lol. If it’s allergies you’re concerned about, try Alavert, or Claritin. They don’t cause the drowsiness that Benadryl does. Avoid anything that says “antihistamine” as that’s an ingredient that will conk you out. You should get a good night’s sleep and you may be groggy in the morning, and have a headache. Just drink lots of water tomorrow to help flush it out of your system.

  • Side Effects Of Benadryl Allergy

  • The general method with antihistamines (allergy medication like Benadryl) is that you take one a day, and it lasts around 24 hours. The packet will give you all the relevant information.

    Are you using Benadryl for allergies or to sleep?

    As an antihistamine it’ll last around 24 hours, although the grogginess will last for less time than that. But don’t overdose, one a day is quite enough for an adult, let alone a teenager.

  • Benadryl lasts about 4-6 hours(i have a bottle sittin in front of me), unless it’s a 12 hour one. I take one at a time, it helps a little. I take two and I am tired, but it really helps the symptoms. I have had to take it and function, but try to avoid doing that. I use it as a sleep aid now. Not usually affected the next morning as it wears off long before I get up.

  • How Long Does Benadryl Last

  • For the pill- there is no average response. Some women don’t miss a beat and ovulate and have normal cycles off the bat, some women have longer cycles at firs with possibly a few anovulatory cycles, and others what the have medical help to being ovulating again. Can’t help with the inhalers, sorry. try reading the packaging or Google it if you don’t get an answer on here.

  • When I was 5, my aunt took one of my Benedryl tablets, and she slept straight through for 24 hours. And that was a 12.5 mg tablet, not a 25er.

    Benedryl gives you quite a hangover – your mouth feels like cotton, and so does your brain. If you drink a lot of icewater, heavy on the ice, you can recover somewhat in 2-3 hours, but you should anticipate it taking 24 hours or more before you shake off the effects.

    When I need it, I need it – but I’ve hated Benedryl’s side effects for half a century….

  • 4-6 hours for regular benedryl. I find it takes a little longer to get out of my system if I go right to sleep though. Usualy 6-8 hours (usually closer to the 6 range though). I’m always a little extra groggy after awaking from a benedryl coma, but after 15-20 min, its like any other morning.

  • Important information

    Use caution when driving, operating machinery, or performing other hazardous activities. Benadryl may cause dizziness or drowsiness. If you experience dizziness or drowsiness, avoid these activities. Use alcohol cautiously. Alcohol may increase drowsiness and dizziness while taking Benadryl.

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  • When I take it to sleep I wake up groggy as crap and it doesnt wear off quick in the morning. I hate it and only use it in extreme circumstances. I keep it around for the rare occasion I get an anxiety attack. I’ve taken 4 and felt normal cause I was that anxious but if I take it just to sleep, one wipes me out.

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