Benadryl Overdose Side Effect Reports


The following Benadryl Overdose side effect reports were submitted by healthcare professionals and consumers.

This information will help you understand how side effects, such as Overdose, can occur, and what you can do about them.

A side effect could appear soon after you start Benadryl or it might take time to develop.


Disorientation, Euphoric Mood, Overdose

This Overdose side effect was reported by a consumer or non-health professional from US. A 16-year-old patient (weight:NA) experienced the following symptoms/conditions: NA. The patient was prescribed Benadryl Allergy (dosage: NA), which was started on Jul 27, 2013. Concurrently used drugs: NA. When starting to take Benadryl Allergy the consumer reported the following symptoms:
  • Disorientation
  • Euphoric Mood
  • Overdose
These side effects may potentially be related to Benadryl Allergy.
Completed Suicide, Mechanical Ventilation, Unresponsive To Stimuli, Overdose, Convulsion

This Overdose Benadryl side effect was reported by a consumer or non-health professional from US on Aug 01, 2013. A Female , 41 years of age, was treated with Benadryl. The patient presented the following health conditions:
  • Completed Suicide
  • Mechanical Ventilation
  • Unresponsive To Stimuli
  • Overdose
  • Convulsion
. Benadryl dosage: NA. Additional drugs used at the same time:
  • Xanax
The patient was hospitalized.
Overdose, Victim Of Homicide

This is a Benadryl side effect report of a 2-year-old female patient (weight:NA) from US, suffering from the following symptoms/conditions: homicide, who was treated with Benadryl (dosage:Two Or Three Syringes, start time: 201306), combined with: NA., and developed a serious reaction and a Overdose side effect. The patient presented with:
  • Overdose
  • Victim Of Homicide
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Benadryl treatment in female patients suffering from homicide, resulting in Overdose.
Overdose, Dry Mouth

A 34-year-old patient (weight: NA) from US with the following symptoms: NA started Benadryl Allergy Ultratab treatment (dosage: 200mg And For One Year, About 5-6 Years Ago Took 800-900 Mg) on May 21, 2001. Soon after starting Benadryl Allergy Ultratab treatment, the consumer experienced several side effects, including:
  • Overdose
  • Dry Mouth
. Concurrently used drugs: NA. This finding indicates that some patients can be more vulnerable to developing Benadryl Allergy Ultratab side effects, such as Overdose.
Asperger^s Disorder, Overdose, Screaming

A patient from US was prescribed and started Benadryl on Jun 20, 2013. Patient felt the following Benadryl side effects: asperger^s disorder, overdose, screaming Additional patient health information: male , weighting 30.00 lb, The consumer reported the following symptoms: . Benadryl dosage: NA. Concurrently used drugs: NA.
Renal Failure, Urinary Tract Infection, Overdose, Road Traffic Accident, Sedation, Agitation

This report suggests a potential Benadryl Allergy Dye-free Overdose side effect(s) that can have serious consequences. A 26-year-old patient from US (weight:NA) was diagnosed with the following health condition(s): NA and used Benadryl Allergy Dye-free (dosage: Over 50 Liquid Gels Had Been Doing For About A Year) starting NS. Soon after starting Benadryl Allergy Dye-free the patient began experiencing various side effects, including:
  • Renal Failure
  • Urinary Tract Infection
  • Overdose
  • Road Traffic Accident
  • Sedation
  • Agitation
Drugs used concurrently:
  • Adderall
The patient was hospitalized. Although Benadryl Allergy Dye-free demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Overdose, may still occur.
Tardive Dyskinesia, Depressed Level Of Consciousness, Aspiration, Overdose

An adverse event was reported by a physician on Apr 17, 2013 by a male taking Benadryl (dosage: NA) . Location: US , 91 years of age, weighting 104.9 lb, patient began experiencing various side effects, including: Directly after treatment started, patient experienced the unwanted or unexpected Benadryl side effects: tardive dyskinesia, depressed level of consciousness, aspiration, overdose. Additional medications/treatments: The patient was hospitalized.
Overdose, Off Label Use

This Overdose problem was reported by a consumer or non-health professional from US. A patient (weight: NA) was diagnosed with the following medical condition(s): euphoric mood.On Jul 01, 2012 a consumer started treatment with Benadryl (dosage: (20-30 Tabs/caps/gels) 15-30 Pill Each Day) Approximately 6-8 Months). The following drugs/medications were being taken at the same time:
  • Marijuana
  • Cocaine
  • Maitake Mushroom
When commencing Benadryl, the patient experienced the following unwanted symptoms /side effects:
  • Overdose
  • Off Label Use
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Overdose, may become evident only after a product is in use by the general population.
Hallucination, Abnormal Dreams, Insomnia, Overdose, Off Label Use

This is a Benadryl Allergy side effect report of a 50-year-old female patient (weight: NA) from US. The patient developed the following symptoms/conditions: NA and was treated with Benadryl Allergy (dosage: NA) starting Mar 06, 2013. Concurrently used drugs:
  • Tylenol Pm
  • Ritalin (20mg, 3 Times A Day From Week.)
  • Ritalin (20mg, 3 Times A Day From Week.)
  • Ritalin (20mg, 3 Times A Day From Week.)
  • Bupropion (150mg For One And Half Weeks)
  • Abilify (5mg From Years)
  • Citalopram (20mg/day From Years)
  • Percocet (5mg/325mg 4 Times A Day From Years)
Soon after that, the consumer experienced the following of symptoms:
  • Hallucination
  • Abnormal Dreams
  • Insomnia
  • Overdose
  • Off Label Use
This opens a possibility that Benadryl Allergy could cause Overdose and that some female patients may be more susceptible.
Overdose, Off Label Use, Therapeutic Response Unexpected

This Overdose side effect was reported by a consumer or non-health professional from US on Apr 24, 2013. A patient from US , 42 years of age, weighting 145.0 lb, was diagnosed with and was treated with Benadryl Allergy. Directly after treatment started, patient experienced the unwanted or unexpected Benadryl side effects: overdose, off label use, therapeutic response unexpected. Benadryl Allergy dosage: 6-12 Tablets Taken 2x. These side effects may potentially be related to Benadryl Allergy.
Hallucination, Cerebrovascular Accident, Overdose, Dizziness, Malaise, Off Label Use

This Overdose side effect was reported by a consumer or non-health professional from US. A 83-year-old female patient (weight:NA) experienced the following symptoms/conditions: arthropod bite. The patient was prescribed Benadryl Allergy Kapgels (dosage: 2 Kapgels, One Morning And One At Night), which was started on NS. Concurrently used drugs:
  • Benadryl Topical Extra Strength
  • Ativan
When starting to take Benadryl Allergy Kapgels the consumer reported the following symptoms:
  • Hallucination
  • Cerebrovascular Accident
  • Overdose
  • Dizziness
  • Malaise
  • Off Label Use
The patient was hospitalized. These side effects may potentially be related to Benadryl Allergy Kapgels.
Overdose, Hallucination, Hypersomnia

This Overdose Benadryl side effect was reported by a consumer or non-health professional from UNITED STATES on Apr 02, 2012. A Female , 33 years of age, weighting 220.0 lb, was treated with Benadryl. The patient presented the following health conditions:
  • Overdose
  • Hallucination
  • Hypersomnia
. Benadryl dosage: 300 Pills Weekly In The Beginning And 700-900 Pills A Week At The End. Additional drugs used at the same time: NA.
Hallucination, Overdose, Hypersomnia

This is a Benadryl side effect report of a 36-year-old female patient (weight:NA) from UNITED STATES, suffering from the following symptoms/conditions: NA, who was treated with Benadryl (dosage:300 Pills Weekly In The Beginning And 700-900 Pills A Week At The End, start time: NS), combined with: NA., and developed a serious reaction and a Overdose side effect. The patient presented with:
  • Hallucination
  • Overdose
  • Hypersomnia
which developed after the beginning of treatment. This side effect report can indicate a possible existence of increased vulnerability to Benadryl treatment in female patients suffering from NA, resulting in Overdose.
Loss Of Consciousness, Syncope, Transient Ischaemic Attack, Overdose, Cerebral Infarction

A patient (weight: NA) from MEXICO with the following symptoms: NA started Benadryl treatment (dosage: NA) on Dec 03, 2011. Soon after starting Benadryl treatment, the consumer experienced several side effects, including:
  • Loss Of Consciousness
  • Syncope
  • Transient Ischaemic Attack
  • Overdose
  • Cerebral Infarction
. Concurrently used drugs:
  • Clorotrimeton
This finding indicates that some patients can be more vulnerable to developing Benadryl side effects, such as Overdose.
Syncope, Loss Of Consciousness, Overdose, Cerebral Infarction

A patient from MEXICO was prescribed and started Benadryl on Dec 20, 2011. After Benadryl was administered, patient encountered several Benadryl side effects: syncope, loss of consciousness, overdose, cerebral infarction Additional patient health information: male , weighting 176.4 lb, The consumer reported the following symptoms: . Benadryl dosage: NA. Concurrently used drugs:
  • Clorotrimeton
Loss Of Consciousness, Syncope, Overdose

This report suggests a potential Benadryl Overdose side effect(s) that can have serious consequences. A patient from MEXICO (weight:NA) was diagnosed with the following health condition(s): NA and used Benadryl (dosage: NA) starting Dec 03, 2011. Soon after starting Benadryl the patient began experiencing various side effects, including:
  • Loss Of Consciousness
  • Syncope
  • Overdose
Drugs used concurrently:
  • Clorotrimeton
Although Benadryl demonstrated significant improvements in a number of clinically relevant cases, troublesome symptoms, such as Overdose, may still occur.
Disturbance In Social Behaviour, Overdose, Dependence

An adverse event was reported by a consumer or non-health professional on Oct 22, 2011 by a male taking Benadryl (dosage: NA) . Location: UNITED STATES , 23 years of age, patient began experiencing various side effects, including: Patient felt the following Benadryl side effects: disturbance in social behaviour, overdose, dependence. Additional medications/treatments:
Off Label Use, Hypotension, Loss Of Consciousness, Overdose

This Overdose problem was reported by a consumer or non-health professional from UNITED STATES. A 20-year-old female patient (weight: NA) was diagnosed with the following medical condition(s): hypersensitivity,urticaria.On Oct 01, 2010 a consumer started treatment with Benadryl (dosage: NA). The following drugs/medications were being taken at the same time: NA. When commencing Benadryl, the patient experienced the following unwanted symptoms /side effects:
  • Off Label Use
  • Hypotension
  • Loss Of Consciousness
  • Overdose
Although all drugs are carefully tested before they are licensed for use, they carry potential side effect risks. Some side effects, such as Overdose, may become evident only after a product is in use by the general population.
Unevaluable Event, Pharyngeal Oedema, Condition Aggravated, Overdose, Dyspnoea, Urticaria, Hypersensitivity

This is a Benadryl side effect report of a 18-year-old female patient (weight: NA) from UNITED STATES. The patient developed the following symptoms/conditions: NA and was treated with Benadryl (dosage: NA) starting Jan 01, 2004. Concurrently used drugs: NA. Soon after that, the consumer experienced the following of symptoms:
  • Unevaluable Event
  • Pharyngeal Oedema
  • Condition Aggravated
  • Overdose
  • Dyspnoea
  • Urticaria
  • Hypersensitivity
The patient was hospitalized. This opens a possibility that Benadryl could cause Overdose and that some female patients may be more susceptible.
Hypersensitivity, Pharyngeal Oedema, Overdose, Condition Aggravated, Urticaria

This Overdose side effect was reported by a consumer or non-health professional from UNITED STATES on Aug 30, 2011. A female patient from UNITED STATES , 18 years of age, was treated with Benadryl. Patient felt the following Benadryl side effects: hypersensitivity, pharyngeal oedema, overdose, condition aggravated, urticaria. Benadryl dosage: NA.
Multiple prescriptions taken:
  • Diphenhydramine Hydrochloride
The patient was hospitalized. These side effects may potentially be related to Benadryl.
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DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

Benadryl Overdose Causes and Reviews


Opioids, sometimes called narcotics, are a type of drug. They include strong prescription pain relievers, such as oxycodone, hydrocodone, fentanyl, and tramadol. The illegal drug heroin is also an opioid. Some opioids are made from the opium plant, and others are synthetic (man-made).

A doctor may give you a prescription opioid to reduce pain after you have had a major injury or surgery. You may get them if you have severe pain from health conditions like cancer. Some doctors prescribe them for chronic pain.

Opioids can cause side effects such as drowsiness, mental fog, nausea, and constipation. They may also cause slowed breathing, which can lead to Overdose deaths. If someone has signs of an Overdose, call 9-1-1:

  • The person's face is extremely pale and/or feels clammy to the touch
  • Their body goes limp
  • Their fingernails or lips have a purple or blue color
  • They start vomiting or making gurgling noises
  • They cannot be awakened or are unable to speak
  • Their breathing or heartbeat slows or stops

Other risks of using prescription opioids include dependence and addiction. Dependence means feeling withdrawal symptoms when not taking the drug. Addiction is a chronic brain disease that causes a person to compulsively seek out drugs, even though they cause harm. The risks of dependence and addiction are higher if you abuse the medicines. Abuse can include taking too much medicine, taking someone else's medicine, taking it in a different way than you are supposed to, or taking the medicine to get high.

Opioid abuse, addiction, and Overdoses are serious public health problems in the United States. Another problem is that more women are abusing opioids during pregnancy. This can lead to babies being addicted and going through withdrawal, known as neonatal abstinence syndrome (NAS). Opioid abuse may sometimes also lead to heroin use, because some people switch from prescription opioids to heroin.

The main treatment for prescription opioid addiction is medication-assisted treatment (MAT). It includes medicines, counseling, and support from family and friends. MAT can help you stop using the drug, get through withdrawal, and cope with cravings. There is also a medicine called naloxone which can reverse the effects of an opioid Overdose and prevent death, if it is given in time.

To prevent problems with prescription opioids, be sure to follow your doctor's instructions when taking them. Do not share your medicines with anyone else. Contact your doctor if you have any concerns about taking the medicines.

NIH: National Institute on Drug Abuse


Benadryl Overdose Reviews

Sun, 04 Sep 2011

Can I die from taking this many. Is it physicly addicting? Sorry about my spelling.

Mon, 18 Jul 2011

I loved these strips. I have had allergic reactions to my own allergy shots. After waiting at the Dr.'s office for 15 minutes after my allergy shot, I leave to go shopping. Sometimes I can feel a little thickening in my throat, similar to when I've had a really bad reaction and had to go to the ER for help, or went back to the Dr.'s office for a shot of epinepherine. When I feel just a small reaction beginning, I have put one of the Benadryl Quick Dissolve Strips on my tongue. I get a pretty fast result and I can continue shopping rather than worrying about a worse reaction.

Now, when I went to buy more of this product, it isn't available at any local stores, or on line at safe sites. Each store tells me that people are coming in and wanting them and getting upset when they can't find them.

Why were these strips taken off the market?

Sun, 21 Mar 2010
Does taking too much Benadryl cause a person to fall asleep and not wake up?
Wed, 01 Sep 2010
It was given to me in a hospital through emergency room, for nauseau. Nusrse said that they use it for that as well. Is true and can it be usedat home for the same?
Thu, 24 Mar 2011
My son is allergic to children's Benadryl. It causes him to develop eye infections (conjunctivitus).
Sat, 30 Apr 2011
I've noticed that it when I am with my partner it makes me sensitive, but I am not able to be aroused. Is anyone else having the same issue. I've been taking it for alergies since I was a teenager. Its the only thing that has ever worked for me.
DISCLAIMER: ALL DATA PROVIDED AS-IS, refer to terms of use for additional information.

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Top Benadryl Side Effects

Off Label Use (181)
Dyspnoea (162)
Nausea (141)
Hypersensitivity (139)
Urticaria (126)
Somnolence (119)
Vomiting (116)
Loss Of Consciousness (113)
Rash (109)
Pain (109)
Pruritus (108)
Headache (108)
Overdose (105)
Dizziness (102)
Product Quality Issue (102)
Insomnia (96)
Heart Rate Increased (86)
Hallucination (80)
Feeling Abnormal (79)
Condition Aggravated (78)
Anxiety (46)
Infusion Related Reaction (46)
Tremor (45)
Fatigue (45)
Diarrhoea (43)
Convulsion (42)
Erythema (38)
Malaise (38)
Pyrexia (38)
Asthenia (37)
Swelling Face (37)
Blood Pressure Increased (37)
Pharyngeal Oedema (35)
Throat Tightness (34)
Dehydration (32)
Chest Pain (31)
Swollen Tongue (30)
Pain In Extremity (30)
Cough (30)
Oedema Peripheral (29)
Hypoaesthesia (29)
Chest Discomfort (29)
Incorrect Dose Administered (28)
Abdominal Pain Upper (27)
Eye Swelling (27)
Flushing (26)
Fall (26)
Confusional State (25)
Lip Swelling (24)
Syncope (24)

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