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Doctor insights on: Why Do Most Allergy Medications Make You Tired

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Why do most allergy medications make you tired?

Why do most allergy medications make you tired?

Allergy medications: Many factors affect sleep. 1st generation antihistamines, e.g. benadryl, (diphenhydramine) doxepin, etc. get into the brain & can cause sleepiness. The sleep quality may not be the best, as sometimes, the muscles relax, causing obstruction in the upper airways, leading to snoring, retention of carbon dioxide, increased blood pressure in the pulmonary circulation, and more work on the heart. ...Read more

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Dr. John Chiu
2,479 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more


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Help! Is it normal for 10 mg loratadine to cause fatigue and nervousness while being treated for allergies? What are the side effects of this drug.

Help! Is it normal for 10 mg  loratadine to cause fatigue and nervousness while being treated for allergies? What are the side effects of this drug.

Loratidine : Loratadine, commonly used to treat allergies, can have side effects including drowsiness, fatigue, abdominal pain, HAs, diarrhea, dry mucous membranes, as well as other side effects. The best option is to let your physician review your current history & response to this med w/ you, and you and s/ he will decide which is the best option for you now :) ...Read more

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How to fix allergy tiredness?

How to fix allergy tiredness?

Excellent question: Allergic rhinitis is associated with fatigue, tiredness, and irritability in addition to the usual nasal and eye symptoms. By treating the allergies the fatigue should improve as well. Generally starting treatment before the pollen season is more successful. An allergist can develop a treatment plan that can address the allergies and lead to less fatigue. ...Read more

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What's the best way to know if my tiredness stems from food allergies?

What's the best way to know if my tiredness stems from food allergies?

Which food: If one food then quit and see what happens , if big reaction and taking lot of Benadryl (diphenhydramine) can cause tiredness. ...Read more

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Heavy eyes dry feeling around eyes feel weird also? Anxiety? Tiredness? Allergies?

Heavy eyes dry feeling around eyes feel weird also? Anxiety? Tiredness? Allergies?

Yes: Could be any of these or many other things. Need more information to help answeer your question ...Read more

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What's causing my tiredness, pollen allergies or the Claritin (loratadine) i take for it ? I have been so tired since pollen season started.

What's causing my tiredness, pollen allergies or the Claritin (loratadine) i take for it ? I have been so tired since pollen season started.

Sleep: Sleep apnea could be the main reason but Claritin (loratadine) does have a mild sedative effect in some more than others. Sleep disruption because of allergy symptoms is also common. Allergy itself is not supposed to cause tiredness but I can't deny that many patients do have this problem. ...Read more

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Pollen allergy and adrenal insufficiency. Could that be a cause for tiredness?

Pollen allergy and adrenal insufficiency. Could that be a cause for tiredness?

Whoa!: Allergies make people tired, but if you've been diagnosed with adrenal insufficiency by an evidence-based physician, you have not only an explanation for longstanding fatigue and ill-health, but a life-threatening health issue. You need to be under the care of a physician who can manage it and also communicate well. Stay proactive and good luck. ...Read more

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Can fall allergies make you tired and anxious?

Can fall allergies make you tired and anxious?

Probable: Allergic rhinitis has been associated with fatigue and sleep disruptions. These issues may make you anxious although there may be other causes to be considered. ...Read more