HealthCareMagic is now Ask A Doctor - 24x7 | https://www.askadoctor24x7.com

Will A 300mg Of Benadryl Be Considered As An Overdose?

Posted on Tue, 30 Jun 2015

Question: i have taken 300mg of benadryl (DIPHENHYDRAMINE) at once. am i going go overdose?

Answered by Dr. Vivek Chail (22 minutes later)

Brief Answer:
Taking 300 mg at once is above recommended dose, please be cautious

Detailed Answer:
Hi XXXX,
Thanks for writing in to us.

I have read through your query in detail.
Please find my observations below.

1. As I have discussed your intake of 150 mg of Benadryl on a previous occasion, it might be recalled that the maximum allowed dose of diphenhydramine Hcl is 400 mg in a day.

2. Taking 300 mg at once is above recomended dose but will not cause any adverse drug effects.

3. The drowsines might be significant so you are advised not to participate in any activity requiring alertness.

Hope this answers your question. Please feel free to correct any oversight in my interpretation of your problems and discuss them in detail as per your requirements.

Hope your query is answered.
Do write back if you have any doubts.

Regards,
Dr.Vivek

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar

Follow up: Dr. Vivek Chail (2 minutes later)

Thank you very much your answer has saved me from a night of worry

Answered by Dr. Vivek Chail (9 minutes later)

Brief Answer:
Take care

Detailed Answer:
Hi XXXX,
Thanks for writing back with an update.

1. Please be cautious when taking medicines as you have taken higher than the usual dose on more than one occasion, probaly due to anxiety. Take care.

Hope your query is answered.
Do write back if you have any doubts.

Regards,
Dr.Vivek

Note: For more detailed guidance, please consult an Internal Medicine Specialist, with your latest reports. Click here..

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar