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DRUG INTERACTION and Benadryl

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DRUG INTERACTION Symptoms and Causes

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions.

One problem is interactions, which may occur between

  • Two drugs, such as aspirin and blood thinners
  • Drugs and food, such as statins and grapefruit
  • Drugs and supplements, such as ginkgo and blood thinners
  • Drugs and diseases, such as aspirin and peptic ulcers

Interactions can change the actions of one or both drugs. The drugs might not work, or you could get side effects.

Side effects are unwanted effects caused by the drugs. Most are mild, such as a stomach aches or drowsiness, and go away after you stop taking the drug. Others can be more serious.

Drug allergies are another type of reaction. They can be mild or life-threatening. Skin reactions, such as hives and rashes, are the most common type. Anaphylaxis, a serious allergic reaction, is more rare.

When you start a new prescription or over-the-counter medication, make sure you understand how to take it correctly. Know which other medications and foods you need to avoid. Ask your health care provider or pharmacist if you have questions.

Check out the latest treatments for DRUG INTERACTION

DRUG INTERACTION treatment research studies

Benadryl clinical trials, surveys and public health registries


Find Drug Side Effect reports



Benadryl Side Effects

Off Label Use (181)
Dyspnoea (162)
Nausea (142)
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)

➢ More


Common Meds

Abilify (10132)
Adderall (1304)
Amlodipine (6664)
Amoxicillin (4387)
Benadryl (1568)
Celebrex (12876 )
Celexa (1342)
Cialis (2975)
Cipro (8580)
Citalopram (7792)
Crestor (18839)
Cymbalta (14373)
Doxycycline (1757)
Effexor (7289)
Flexeril (435)
Flomax (2177)
Fluoxetine (4261)
Gabapentin (4593)
Hydrocodone (2469)
Ibuprofen (8222)
Lantus (10968)
Lexapro (3499)
Lipitor (17769)
Lisinopril (8919)
Lyrica (27148)
Medrol (650)
Mirena (41254)
Mobic (957)
Morphine (5356)
Naproxen (538)
Neurontin (6501)
Oxycodone (4438)
Pradaxa (13372)
Prednisone (5926)
Prilosec (2631)
Prozac (1954)
Seroquel (27216)
Simvastatin (8348)
Synthroid (4452)
Tamiflu (5585)
Topamax (3748)
Tramadol (5054)
Trazodone (1458)
Viagra (5394)
Vicodin (1153)
Wellbutrin (6324)
Xanax (2847)
Zocor (5718)
Zoloft(6792)
Zyrtec(1669)

Recent Reviews

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

Convulsions and seizures sometimes for up to a week and a half at a time

Does taking too much benadryl cause a person to fall asleep and not wake up?

Hi i like know about heavy dosage of benadryl side effects can anybody please give feedback waiting for positive response regards vijay

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'v

I take up to 50 Benadryl a day. How many should I take? I like how it makes me feel.

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.

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?

My son is allergic to children's Benadryl. It causes him to develop eye infections (conjunctivitus).

Chantix caused me to haveseizures I would not recommend anyone to take this drug find a different way to quit smoking that is safe.

I HAD 1 SHOT OF THIS AND WITHIN 12 HOURS I WENT FROM A VERY NORMAL BLOOD PRESSURE TO WAKING AT 5 A.M. NEXT DAY WITH 198/110 AND 104 PULSE RATE. IT HAS CONTINUED ALL WEEK AFTER AND I'M NOW ON A BLOOD PRESSURE DRUG TO TRY AND CONTROL IT. EVEN WITH DR

can advagraf makke you look like you are pregnant? Can this drug affect your eye site--blurry vision

Does anyone else have insomnia problems, with this drug, was fine before taking it, but now having major trouble getting to sleep and staying asleep.

I have experienced panic attacks, light headedness and pasty mouth taking this drug at 400mg's.

Impact of this drug on blood pressure. Should I be worried?

My symptoms were tired, weak, unable to sleep. Was prescribed half of a 15 MG Mirtazapine nightly to help me sleep. Has this drug been successful used as a sleeping aid?

WHAT ARE SIDE EFFECT OF COTRIMOXAXOLE DRUG

<!--StartFragment--> I have advanced Rheumatoid Arthritis. My Left wrist swelled painfully. Had a negative X-ray so Dr (fully informed for current drug regimens and allergies--Aspirin, Penicillin, Thoradamides, Ornate, Iodine, Latex)

<b>Describe Your Levoxacin Experience Here:</b> My mother is taking the drug and has started shaking. Is this common?

DRUG INTERACTION Clinical Trials and Studies

Treatments might be new drugs or new combinations of drugs, new surgical procedures or devices, or new ways to use existing treatments. The goal of clinical trials is to determine if a new test or treatment works and is safe. Clinical trials can also look at other aspects of care, such as improving the quality of life for people with chronic illnesses. People participate in clinical trials for a variety of reasons. Healthy volunteers say they participate to help others and to contribute to moving science forward. Participants with an illness or disease also participate to help others, but also to possibly receive the newest treatment and to have the additional care and attention from the clinical trial staff.
Rank Status Study
1 Recruiting Pharmacogenetic Factors and Side Effects of Metoclopramide and Diphenhydramine
Condition: Drug Metabolism, Poor, CYP2D6-RELATED
Interventions: Drug: Diphenhydramine;   Drug: Metoclopramide
Outcome Measures: Area under curve of metoclopramide (MCP);   Area under curve of diphenhydramine(DPH);   Cmax of metoclopramide;   Tmax of metoclopramide;   Cmax of diphenhydramine;   Tmax of diphenhydramine
2 Recruiting Diphenhydramine for Acute Migraine
Condition: Migraine
Interventions: Drug: metoclopramide;   Drug: diphenhydramine;   Drug: placebo
Outcome Measure: Sustained headache relief
3 Not yet recruiting Study of Promethazine for Treatment of Diabetic Gastroparesis
Condition: Diabetic Gastroparesis
Interventions: Drug: Promethazine;   Drug: Sugar pill
Outcome Measures: Change in patient-reported symptoms as measured by the Gastroparesis Cardinal Symptom Index score (GCSI, 14) from week 0 to week 4.;   Occurrence of adverse events;   Use of rescue medication;   The impact on work activity as measured by the Work Productivity and Activity Impairment Questionnaire. (WPAI).
4 Unknown  Adjunct Sedatives in Procedures Involving Endoscopic Ultrasound (EUS) and Endoscopic Retrograde Cholangiopancreatography (ERCP)
Conditions: Endoscopic Ultrasound (EUS);   Endoscopic Retrograde Cholangiopancreatography (ERCP)
Interventions: Drug: Saline;   Drug: Diphenhydramine;   Drug: Promethazine
Outcome Measures: Sedation Level;   Time to achieve adequate level of sedation to begin procedure;   Time for Recovery;   Adverse Symptoms From Sedative Agents
5 Not yet recruiting Diphenhydramine as an Adjunctive Sedative in Patients on Chronic Opioids
Conditions: Colonoscopy;   Adjunct Anesthesia Medication
Interventions: Drug: Diphenhydramine;   Drug: Placebo
Outcome Measures: Dosage of Fentanyl and Midazolam;   Quality of sedation;   Duration of Procedure;   Adverse events;   24 hour follow up
6 Unknown  Morphine Versus Morphine-promethazine Combination for Acute Low Back Pain Relief in the Adult Emergency Department
Condition: Low Back Pain
Interventions: Drug: Morphine-Promethazine;   Drug: morphine
Outcome Measures: Pain relief;   Ambulatory status
7 Recruiting Antitussive Effect of a Naturally Flavored Syrup Containing Diphenhydramine, Compared With Dextromethorphan and Placebo
Condition: Cough Reflex Sensitivity
Interventions: Drug: Phenylephrine;   Drug: Diphenhydramine;   Drug: Dextromethorphan
Outcome Measure: change in cough reflex sensitivity to capsaicin
8 Not yet recruiting Randomized Trial of Diphenhydramine Versus Continued Midazolam in "Difficult-to-sedate" Patients Undergoing Colonoscopy
Conditions: Sedation;   Endoscopy
Interventions: Drug: Diphenhydramine;   Drug: Midazolam
Outcome Measure: Proportion of patients who achieve adequate sedation to allow colonoscopy (defined as MOAA/S ≤3)
9 Recruiting Ketamine as a Rapidly-Acting Antidepressant in Depressed Emergency Department Patients
Condition: Depression
Interventions: Drug: Ketamine;   Drug: Diphenhydramine
Outcome Measures: Evaluate the effects of ketamine on depressive symptomatology;   Evalaute the effects of ketamine on treatment alliance;   Evalaute the effects of ketamine on suicidal ideation
10 Unknown  Does Thiamine Help Vomiting and Nausea in Pregnancy?
Condition: Hyperemesis Gravidarum
Intervention: Drug: thiamine & promethazine
Outcome Measure: the improvement in nausea and/or vomiting after treatment
11 Not yet recruiting Histamine Glutamate Antagonism in Stroke
Conditions: Acute Cerebrovascular Accident;   Cerebral Edema
Interventions: Drug: Diphenhydramine;   Drug: Pantoprazole;   Drug: Famotidine;   Drug: Dextromethorphan
Outcome Measures: Modified Rankin Score;   National Institutes of Health Stroke Severity (NIHSS) Scale;   Neurological examination of the subject;   All cause mortality data
12 Recruiting Pazopanib Versus Temsirolimus in Poor-Risk Clear-Cell Renal Cell Carcinoma (RCC)
Condition: Kidney Cancer
Interventions: Drug: Pazopanib;   Drug: Temsirolimus;   Behavioral: Quality of Life Assessment;   Drug: Benadryl
Outcome Measure: Progression Free Survival (PFS)
13 Not yet recruiting Psilocybin-facilitated Treatment for Cocaine Use
Condition: Cocaine-Related Disorders
Interventions: Drug: Psilocybin;   Drug: Diphenhydramine
Outcome Measure: The difference between the treatment and placebo groups in the number of participants with biochemically verified cocaine abstinence.
14 Recruiting FUS1-nanoparticles and Erlotinib in Stage IV Lung Cancer
Condition: Lung Cancer
Interventions: Drug: DOTAP:Chol-fus1;   Drug: Erlotinib;   Drug: Dexamethasone;   Drug: Diphenhydramine
Outcome Measures: Maximum Tolerated Dose (MTD) Level for Drug Treatment Combination;   Response Rate
15 Recruiting The Role of Intravenous (IV) Lidocaine in the Management of Chronic Neuropathic Pain of Peripheral Nerve Origin
Condition: Neuropathic Pain
Interventions: Drug: Lidocaine;   Drug: Diphenhydramine
Outcome Measures: Changes from Baseline Pain scores on the Visual Analog Scale at 6 weeks;   Hospital Anxiety and Depression Scale;   Modified Brief Pain Inventory;   Leeds Sleep Evaluation Questionnaire;   Patient Global Satisfaction with Treatment and Impression of Change;   Side Effects;   Quality of Life Health Outcome Instrument
16 Not yet recruiting Countermeasures to Reduce Sensorimotor Impairment and Space Motion Sickness Resulting From Altered Gravity Levels
Condition: Vestibular
Interventions: Drug: Promethazine;   Behavioral: Hyper gravity training;   Drug: Placebo;   Behavioral: No hypergravity training
Outcome Measure: Rate of recovery of roll tilt perception errors after exposure to hypergravity
17 Not yet recruiting First-time-in-man, to Assess the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of BP1.5375
Condition: Healthy Male Volunteers
Interventions: Drug: BP1.5375 suspension;   Drug: Diphenhydramine;   Drug: Placebo
Outcome Measures: Single Ascending Dose - safety and tolerability (Part 1);   Proof of Concept - effect on polysomnography (Part 2)
18 Not yet recruiting A Double-Blind Trial of Psilocybin-Assisted Treatment of Alcohol Dependence
Condition: Alcohol Dependence
Interventions: Drug: Psilocybin;   Drug: Diphenhydramine;   Behavioral: Motivational Enhancement and Taking Action (META)
Outcome Measures: percent heavy drinking days;   Changes in vital signs;   adverse events;   Percent days abstinent;   drinks per drinking day;   days to first drinking day;   Days to first heavy drinking day;   consequences of drinking;   craving;   self efficacy;   Motivation to change drinking behavior
19 Recruiting Study Looking at End Expiratory Pressure for Altitude Illness Decrease (SLEEP-AID)
Condition: Acute Mountain Sickness
Interventions: Device: Theravent;   Device: Control
Outcome Measures: Incidence of acute mountain sickness;   number of nocturnal desaturations;   acute mountain sickness severity;   nocturnal awakenings;   subjective quality of sleep
20 Recruiting Treatment of Orthostatic Hypotension in Autonomic Failure
Conditions: Autonomic Failure;   Orthostatic Hypotension
Interventions: Drug: Atomoxetine;   Drug: Acarbose;   Drug: Pyridostigmine Bromide;   Drug: Yohimbine;   Drug: Midodrine HCl;   Drug: placebo;   Drug: Modafinil;   Drug: Octreotide;   Other: water intake;   Drug: Diphenhydramine Hydrochloride;   Drug: Ranitidine HCL;   Drug: Tranylcypromine;   Drug: Ergotamine/ Caffeine;   Drug: Celecoxib;   Drug: Pseudoephedrine;   Drug: Methylphenidate;   Drug: Indomethacin;   Drug: Ibuprofen;   Drug: Oxymetazoline 0.05% nasal solution;   Dietary Supplement: Bovril;   Drug: Acetazolamide;   Drug: Rivastigmine tartrate;   Drug: Carbidopa/levodopa;   Device: Inflatable abdominal binder;   Device: inflatable abdominal binder (sham)
Outcome Measures: Increase in seated systolic blood pressure 1-hr post drug compared to baseline.;   Increase in standing time 1-hr post drug compared to baseline