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Doctor insights on: Antihistamine Overdose Symptoms

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Melatonin overdose symptoms?

Melatonin overdose symptoms?

Drowsy,weak, shakey: People feel drowsy, weak, and disoriented when they take excessive amounts of this drug. They may also feel shaky and notice a headache, . Some people begin having psychotic thoughts and feeling depressed, which can be harmful in itself. ...Read more

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Dr. Paul Carter
650 doctors shared insights

Antihistamine (Definition)

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


Dr. Anlin Xu Dr. Xu
8 doctors agreed:
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Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Dr. Anlin Xu Dr. Xu
8 doctors agreed:
Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Yes: Claritin is a second generation antihistamine which causes much less drowsiness than first generation antihistamine, like benadryl (diphenhydramine). The number of people who feel drowsy on Claritin is so low that it is labeled "non-drowsy". But each of us is unique. I have plenty of patients who feel drowsy on claritin, especially petite women. ...Read more

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Could Benadryl (diphenhydramine) help with asthma like allergy symptoms?

Could Benadryl (diphenhydramine) help with asthma like allergy symptoms?

Benadryl (diphenhydramine) is sedating: Claritin, zyrtec, allegra, or Benadryl (diphenhydramine) can help with allergy and asthma symptoms caused by allergies to respiratory pollens or other airborne allergens. One should work with his doctor to see which combination of over-the-counter allergy meds and prescription asthma inhalers/pills work the best. A patient will learn over time, what medicines to add or increase, depending on how "bad" the air is. ...Read more

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Dr. Al Hegab Dr. Hegab
2 doctors agreed:
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Can aerius antihistamine meds cause Constipation?

Dr. Al Hegab Dr. Hegab
2 doctors agreed:
Can aerius antihistamine meds cause Constipation?

Unlikely: Not a known side effect of the drug, but you can still try for yourself to hold it and see if the constipation resolves, otherwise see your doctor for evaluation if it is really bothersome, as there are several causes for constipation, best wishes ...Read more

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Will something like Claritin (loratadine) or zyrtec relieve cat allergy symptoms?

Will something like Claritin (loratadine) or zyrtec relieve cat allergy symptoms?

Possible: Oral antihistamines are used to treat itchy nose, eye and sneezing. So if one is experiencing these symptoms use of anti histamines would be reasonable. ...Read more

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Does nasalcrom (cromolyn) cause drowsiness like some antihistamines do?

Does nasalcrom (cromolyn) cause drowsiness like some antihistamines do?

Not usually: Nasalcrom is not an antihtistamine. It is a nasal topical formulation of cromolyn, which is a mast-cell stabilizer. Essentially interfering with the release of histamine as well as other inflammatory mediators from the mast cell. ...Read more

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Can a person taking risperidone take Allegra-D allergy & congestion?

Can a person taking risperidone take Allegra-D allergy & congestion?

Yes: Not interaction, good that you asked, always exercise caution with multiple medications, good luck ...Read more

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Will allergy medicine, like zyrtec, (cetirizine) relive cold symptoms?

Will allergy medicine, like zyrtec, (cetirizine) relive cold symptoms?

Cold symptoms: Are you sure it is a cold not allergies? Zyrtec (cetirizine) will not alleviate cold symptoms. A decongestant containing medication will help. ...Read more

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Can you overdose on hydrocodones and benadryl (diphenhydramine)?

Yes: That is possible. Call 1-800-222-1222 24 hours per day, 7 days per week to reach any poison control center in the United States. You will be connected with an expert who will direct you how to proceed. Please have all product information available when you call. ...Read more

Dr. John Chiu Dr. Chiu
2 doctors agreed:
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Besides doxylamine & diphenhydramine, what other OTC antihistamines cause drowsiness? Without a prescription.

Dr. John Chiu Dr. Chiu
2 doctors agreed:

Allegra (fexofenadine): All antihistamines especially the first generation ones (benadryl, bromchlorpheniramine, CTM) can cause drowsiness when given in sufficient doses. Zyrtec (cetirizine) at the recommended dose and Loratadine at 2x the recommended dose can cause drowsiness in some people. The least likely AH to cause drowsiness is fexofenadine (Allegra). ...Read more

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What can result from Advil & Benadryl (diphenhydramine) overdoses?

What can result from Advil & Benadryl (diphenhydramine) overdoses?

OD vs. more dosage: Od means taking the whole bottle.. That is dangerous and life threatenning. But as extra dosage every now and then of this would not be of any dangerous concern. ...Read more

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Can taking the OTC chlorpheniramine maleate (antihistamine) make you sweaty?

Can taking the OTC chlorpheniramine maleate (antihistamine) make you sweaty?

Possible, unlikely: It can cause you to be sweaty, but this would be unlikely. ...Read more

Dr. Neil Kao Dr. Kao
3 doctors agreed:
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Does cetirizine (aka zyrtec) allergy medication contain any stimulant components?

Dr. Neil Kao Dr. Kao
3 doctors agreed:
Does cetirizine (aka zyrtec) allergy medication contain any stimulant components?

No: Cetirizine is also marketed with pseudoefedrine, which can be a stimulant in some people. Avoid zyrtec-d. ...Read more

Overdose (Definition)

When the maximum dose of medication ...Read more