Benadryl side effects

Mar 22, 2021 · Common side effects of Benadryl Injection (diphenhydramine hydrochloride) include: drowsiness, dizziness, headache, irritability, stomach upset, vision changes (e.g., blurred vision), decreased coordination, or dry mouth /nose/throat. Jun 02, 2020 · Common side effects of Benadryl include: drowsiness, fatigue, tiredness, sleepiness, dizziness, disturbed coordination, constipation, dry mouth /nose/throat, difficulty urinating or an enlarged prostate, upset stomach, blurred vision, double vision, tremor, loss of appetite, headache, or nausea. Up to 5 % of people can experience stomach discomfort or diarrhea when taking large quantities of fenbendazole with no breaks. People with severe liver or kidney failure have lower medication excretion rates, therefore, fenbendazole can accumulate and cause unexpected side-effects. Doses should be divided accordingly in this situation. minnesota waterfowl regulations 2022 May 20, 2022 · Thanks to the next-day hangover effect, other symptoms you might experience by day include dry mouth, dizziness, poor focus and forgetfulness. You may also develop a tolerance to the sedative effects pretty quickly, according to the Mayo Clinic, so the longer you take the medication, the less likely they are to help you conk out. mizuto irido height in feet Benadryl Side Effects. Like all medication, Benadryl can also have side effects, which, according to WebMD are: "Drowsiness, dizziness, constipation, stomach upset, blurred vision, or dry mouth/nose/throat may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly. enlarged prostate pain Symptoms may include hives, trouble breathing, or swelling of the throat, tongue, or lips. If left untreated, these reactions can worsen and become life-threatening. Most of these reactions begin within minutes of getting a vaccine. This is why it’s important to stay at the clinic for 15 minutes after getting any vaccine.One of the side effects of Benadryl is drowsiness, which helps to calm anxious dogs. The Merck Veterinary Manual states that diphenhydramine may relieve symptoms of mild-to-moderate anxiety in pets...Benadryl Side Effects Center ... Benadryl ( Diphenhydramin ) ist ein Antihistaminikum zur Behandlung von Allergien, Nesselsucht, Schlaflosigkeit, ... 2019 hyundai santa fe power liftgate not workingWhat Are Side Effects of Benadryl? · drowsiness, · fatigue, · tiredness, · sleepiness, · dizziness, · disturbed coordination, · constipation, · dry mouth/nose/throat, ...Some effects of taking Benadryl to older adults may include confusion, dizziness, trouble urinating, constipation, or drowsiness. The risk of drowsiness, confusion, and drowsiness is falling. If pregnant, consult with your doctor first about the …Other side effects of Benadryl for dogs include increased drooling, panting and depression. They are rare, but there have also been reported and documented instances of dogs who have fatally... las vegas airport shuttle to strip Although Benadryl can help cats cope with itchy skin, allergic reactions, or bug bites, it can have some negative side effects, especially when an overdose occurs. If you encounter any of the following, you should monitor your cat closely, and if the symptoms persist or worsen, you should contact your veterinarian.One of the side effects of Benadryl is drowsiness, which helps to calm anxious dogs. The Merck Veterinary Manual states that diphenhydramine may relieve symptoms of mild-to-moderate anxiety in pets...Diphenhydramine is given by mouth or as an injection and is used on and off label to treat allergic reactions, motion sickness, and to induce sedation. Side effects include sleepiness, and less commonly dry mouth and gastrointestinal upset. Diphenhydramine should not be used in pets that are allergic to this medication and should be used cautiously in pets with glaucoma, enlarged prostate ...Benadryl for Cats: Although cats can take Benadryl, it has potential side effects, including hyperexcitability, diarrhea, decreased appetite and urination, dry mouth, vomiting and sedation. Benadryl can react with a variety of drugs; Drowsiness is a side effect of taking Benadryl for cats just as it is for humans.....Antihistamines such as diphenhydramine, the active ingredient in Benadryl, are used to manage allergic reactions, but they can also cause sedation as a side effect. Because of this, diphenhydramine is in a lot of over-the-counter sleep aids. Some people take Benadryl for anxiety because of the calming side effects it can have.Some effects of taking Benadryl to older adults may include confusion, dizziness, trouble urinating, constipation, or drowsiness. The risk of drowsiness, confusion, and drowsiness is …Some side effects may be serious. If you experience any of the following symptoms, call your doctor immediately: vision problems; difficulty urinating or painful urination; Diphenhydramine may cause other side effects. Call your doctor if you experience any unusual problems while you are taking this medication.Side effects of Benadryl in dogs Benadryl usage comes with several possible side effects, including: Lethargy /drowsiness Dry mouth or increased salivation Increased heart rate Rapid breathing Urinary retention Vomiting Diarrhea Loss of appetite how old is jerry presley elvis cousin Benadryl’s common side effects are: For children, it may cause excitability The user of this product may experience marked drowsiness, and cause hives so those who are driving or operating machinery should watch out for this reaction. It is advised to avoid alcoholic drinks when using Benadryl as it may increase drowsiness.13 nov. 2019 ... Other reported side effects from an overdose of first-generation H1 antihistamines include breathing problems, coma, and seizures,according ... romans 8 highly favored Diphenhydramine (Benadryl) is an OTC and prescription injection medication used to treat hay fever, hives, allergic conjunctivitis, motion sickness, and symptoms of Parkinson's disease. Side effects include sedation, sleepiness, dizziness, constipation, disturbed coordination, drying and thickening of mucus, and urinary retention. Consult your doctor if pregnant or breastfeeding.5 oct. 2020 ... ... high doses of diphenhydramine (Benadryl), a common over-the-counter (OTC) allergy medication, can have potentially fatal side effects. oprah on dr oz 19 iun. 2008 ... Richardson et al reported that the sedative side effects of diphenhydramine subside after four days; this suggests that the sedative benefit is ...Benadryl Allergy - Uses, Side Effects, and More Uses Diphenhydramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. These symptoms include rash, itching,... 9 iul. 2020 ... This video examines the question and remark: Benadryl long term side effects! I WISH I had KNOWN! Benadryl is a common OTC medication and is ... what happens if you take 4 excedrin migraine in 24 hours Aggression and agitation can also be a symptom of Benadryl overdose. Other potential side effects include: Severe lethargy Abnormal heart rate or blood pressure Reluctance to eat Excessive salivation Vomiting Diarrhea Seizures Trouble breathing Some dogs may also have difficulty urinating.Very bad skin irritation. What are some other side effects of this drug? All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away: Skin irritation.Benadryl has few side effects and is generally well-tolerated in most dogs. There’s also a very low risk of overdose. That said, it’s a good idea to be familiar with these potential side effects before giving your dog Benadryl. Side effects usually become apparent within the first hour or so after consumption. kubota skid steer regeneration light RARE side effects If experienced, these tend to have a Severe expression i ; a type of blood disorder where the red blood cells burst called hemolytic anemia ; a blood disorder ; extra heartbeatsHair loss is found among people who take Benadryl, especially for people who are female, 60+ old, have been taking the drug for < 1 month. The phase IV clinical study analyzes which people take Benadryl and have Hair loss. It is created by eHealthMe based on reports of 76,137 people who have side effects when taking Benadryl from the FDA, and ...Elderly patients are more likely to have side effects from taking these medicines. How to take it. Measure the recommended dose in a medicine measure and ...Benadryl is safe to give your dog for allergies, anxiety, motion sickness, and vaccine side effects. Though a typical Benadryl pill is 25 mg, you should only give your dog 0.9-1.8 mg per pound of weight. Make sure that the Benadryl you're giving your dog only contains diphenhydramine. Benadryl is safe for dogs, but don't give any to your dog ...Benadryl (diphenhydramine) OD: Causes sleepiness, weakness, confusion, blurred vision, dry mouth, flushing, fever, shaking, hallucinations, and possibly seizures. If you suspect od... Read More 5.9k views Reviewed >2 years ago Thank Dr. Heidi Fowler and another doctor agree Dr. Heidi Fowler answered Psychiatry 26 years experienceLisinopril side effects are not restricted to the upper airways, though. An equally serious c0mplication that often goes misdiagnosed for weeks or months involves angioedema of the abdomen ( Journal of Emergency Medicine , April, 2016 ; GE Portuguese Journal of Gastroenterology , Dec. 2, 2015; Postgraduate Medicine , March, 2015 ). pentosin atf1 specs blistering, peeling, or loosening of the skin bloating or swelling of the face, arms, hands, lower legs, or feet chest pain or discomfort diarrhea fast, irregular, pounding, or racing heartbeat or pulse feeling of warmth fever general feeling of tiredness or weakness itching joint or muscle pain epson ecotank allinone supertank printer et2720 Diphenhydramine (Benadryl) is an OTC and prescription injection medication used to treat hay fever, hives, allergic conjunctivitis, motion sickness, and symptoms of Parkinson's disease. Side effects include sedation, sleepiness, dizziness, constipation, disturbed coordination, drying and thickening of mucus, and urinary retention. Consult your doctor if pregnant or breastfeeding.Signs of Benadryl overdose include: 3 Blurred vision Very dry eyes Enlarged pupils Dry mouth Ringing in the ear ( tinnitus) Dry, red skin Nausea or vomiting Drowsiness or increased sleepiness Inability to urinate Low blood pressure Rapid heartbeat Unsteadiness Nervousness Agitation, confusion, delirium, or hallucinations Tremor Seizures Depression horse camping in north carolina Benadryl Allergy (diphenhydramine and generic) ... Besides having side effects including drowsiness, confusion, and urinary retention, a new study shows that frequent, ...Nov 07, 2021 · My symptoms go like this: sleepiness for hours (children syrup), heart racing (minutes after taking or after sleeping with it in system), severe anxiety, pale complexion from anxiety, muscle... Benadryl’s common side effects are: For children, it may cause excitability The user of this product may experience marked drowsiness, and cause hives so those who are driving or operating machinery should watch out for this reaction. It is advised to avoid alcoholic drinks when using Benadryl as it may increase drowsiness. sour legend strain Other possible side effects of Benadryl, which can occur at any age, include: sleepiness restlessness fatigue headaches dizziness a sore throat dry mouth stomach discomfort nausea or diarrhea...24 iun. 2017 ... The brand name is Benadryl, but the drug also is in ... The side effects are more pronounced among older people, which Jo Anne Leegant or ...Benadryl: Diphenhydramine belongs to a group of medications known as antihistamines. ... If you are concerned about side effects, discuss the risks and benefits of this medication with your …Jan 08, 2012 · The most common side effects of Benadryl are drowsiness and dizziness. Other common but harmless reactions to diphenhydramine medications like Benadryl include dry mouth, diarrhea or constipation, thick chest mucus and heartburn. Many of these side effects can be easily treated with adequate hydration or other medications. dehydrated recipes Side effects are reported by people who take Benadryl. Common side effects include urticaria among females and death among males. The phase IV clinical study is created by eHealthMe based on 76,251 reports from the FDA, and is updated regularly. You can use the study as a second opinion to make health care decisions. Oct 04, 2021 · Side effects include: Sedation, sleepiness, dizziness , disturbed coordination, epigastric distress, thickening of bronchial secretions. For Healthcare Professionals which of the following is not a chief goal of selforganizing scrum teams skin rash. swollen joints. stomach discomfort, upset or pain. tender swollen glands in neck. tremor. unusual excitement, nervousness, restlessness, or irritability. vomiting. Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional. cpt code 80305 reimbursement medicare Aug 23, 2021 · Examples of mild side effects that have been reported with Benadryl include: sleepiness dizziness * headache low blood pressure constipation dry mouth or nose blurry vision * It just hides the symptoms for a while. What about other side effects? The Side Effects Of Benadryl For Dogs Benadryl may seem like a harmless option. But it has quite a long list of possible side effects. In fact, the Canadian Society of Allergy and Clinical Immunology has given serious warnings about them, even for people.Here are seven unexpected and potentially dangerous side effects of taking allergy medicine long-term, ... We all know to avoid taking a Benadryl before getting behind the wheel of the car, ...23 aug. 2021 ... sleepiness · dizziness*; headache; low blood pressure; constipation; dry mouth or nose; blurry vision*. * To learn more about this side effect ... spc flooring vs parquet Benadryl may cause side effects due to its action on histamine and acetylcholine receptors in the body, especially in the brain and intestine. Common side effects include ( 1) ( 4 ): Drowsiness or sleepiness. Dizziness. Dryness in mouth, throat, or nasal passage. Loss of appetite.These common side effects of apixaban happen in more than 1 in 100 people. There are things you can do to help cope with them: Tiredness and lack of energy If you're tired and lack …They list some of the most common symptoms, including pain and swelling at the injection site and fever, chills, tiredness, and headaches. However, there are some other side effects being reported...Benadryl Side Effects Drowsiness Dizziness Constipation Blurred vision Irritability Dry mouth Difficulty breathing Benadryl is not recommended if you are suffering from asthma, glaucoma, heart disease, liver disease, mood changes, seizures, overactive thyroid gland or kidney problems.Itchy and watery eyes, runny nose, hives, swelling, or trouble breathing are all effects of histamine mistaking something harmless (such as grass or pollen) as a threat to the body. dragonlance 5e 2022 May 13, 2021 · One of the most common side effects of Benadryl is drowsiness. Because of this, some people use Benadryl as a sleep aid. However, it’s also possible that Benadryl can do the opposite. When a... industry restaurant sparta nj menu 1 oct. 2020 ... ... allergy experts agree that long-acting antihistamines work just as quickly as diphenhydramine without sedation or cardiac side effects.23 aug. 2021 ... sleepiness · dizziness*; headache; low blood pressure; constipation; dry mouth or nose; blurry vision*. * To learn more about this side effect ...Benadryl has strong anticholinergic side effects, which include: Dry mouth (xerostomia) Constipation Abdominal pain Diarrhea Abdominal cramping Dry eyes Appetite changes Thickening of bronchial secretions Urinary retention Pupil dilation Blurred vision Dermatologic Side Effects how to use xmrig on linux Common side effects of chemotherapy include: Fatigue. Fatigue is feeling tired or exhausted even if you get enough sleep. It is the most common side effect of chemotherapy. Learn about how to cope with fatigue. Hair loss. Some types of …Lethargy. Skin thinning. Alopecia. Pancreatitis. Weight gain. Certain medical issues in dogs may worsen due to use of dexamethasone. Therefore, your vet should be aware of any other conditions ... tipton carbon fiber cleaning rodExamples of mild side effects that have been reported with Benadryl include: sleepiness dizziness * headache low blood pressure constipation dry mouth or nose blurry vision * * To learn more about...My side effects started in the last few months (head aches, cold hands and feet, blurred vision, anxiety - stress over things in general, being gassy, swollen ankles, dizzy when standing, ). I find that when I drink 1/2 of my weight in oz of water the side effects are less.31 mar. 2020 ... Medical information for Benadryl including its dosage, uses, side, effects, interactions, pictures and warnings. morse code chart Benadryl Syrup is used in the treatment of Cough. View Benadryl Syrup (bottle of 150 ml Syrup) uses, composition, side-effects, price, substitutes, drug interactions, precautions, warnings, expert advice and buy online at best price on 1mg.com. Background Diphenhydramine hydrochloride is a commonly prescribed medicine in hospitalized patients, but its adverse …The recommended adult oral dose ranges from 25 to 50 mg three or four times daily. Common side effects include sedation, impairment of motor function, confusion, dizziness, blurred vision, dry mouth and throat, … snapper 52755 parts Nov 13, 2019 · Even at prescribed doses, medications like Benadryl are associated with sedation, cognitive impairment, and memory problems, said Dr. Anne Ellis, an allergist and professor at Queen's University.... Note: This document contains side effect information about diphenhydramine. Some of the dosage forms listed on this page may not apply to the brand name Benadryl. For the Consumer. Applies to diphenhydramine: oral capsules and tablets, parenteral injection. Side effects include:Examples of mild side effects that have been reported with Benadryl include: sleepiness dizziness * headache low blood pressure constipation dry mouth or nose blurry vision *Common side effects related to utilizing Benadryl for dogs consist of: Sedation Dry mouth Urinary retention Hypersalivation Increased heart rate Rapid breathing Unusual side effects: Diarrhea Throwing up Reduced cravings Increased hungerSide Effects | PAXLOVID™ (nirmatrelvir tablets; ritonavir tablets) Authorized Use. The FDA has authorized the emergency use of PAXLOVID, an investigational medicine, for the treatment of mild-to-moderate COVID-19 in adults and children (12 years of age and older weighing at least 88 pounds [40 kg]) with a positive test for the virus that ... appealing antonym Benadryl overdose may lead to possible complications and may cause damage to your nervous system. Below is the possible prognosis of Benadryl Overdose: Respiratory disturbances, increased heart rate, hallucination, and anxiety are delirious conditions that may lead to sudden death.Benadryl can be safely given to cats at a dose of 0.45 mg/kg of body weight and up to 2.2 mg/kg of body weight. Depending on the specific case the prescribed frequency is every 12 hours or twice a day and up to a maximum frequency of every 8 hours. It is always recommended to consult your veterinarian for accurate case-specific treatment.One of the most common side effects of Benadryl is drowsiness. Because of this, some people use Benadryl as a sleep aid. However, it’s also possible that Benadryl can do the opposite. When a... fda suboxone teeth trouble breathing. diarrhea. difficult or painful urination. an increased need to urinate often. abdominal bloating. nervousness. a feeling of pins and needles on skin. a ... i’m really scared i was taking tylenol pm like 3-5 times a week to help my insomnia it contains diphenhydramine which is basically benadryl. now when i take any medication my body reacts to it...Prior to the invention of diphenhydramine the only other antihistamine on the market was nonspecific in the receptors in targeted and produced severe drowsiness and other side effects as a result. The invention of diphenhydramine lead scientists to develop many more helpful antihistamine drugs that like Benadryl target specific receptors in the ... which of the following are examples of external customers select all that apply Erythromycin may lose its effectiveness over time, and can cause side effects, such as diarrhea. A newer medication, domperidone, with fewer side effects, is also available with restricted access. Medications to control nausea and vomiting. Drugs that help ease nausea and vomiting include diphenhydramine (Benadryl, others) and ondansetron (Zofran). miraculous ladybug power rangers male oc wattpad 19 iun. 2008 ... Richardson et al reported that the sedative side effects of diphenhydramine subside after four days; this suggests that the sedative benefit is ...Benadryl has strong anticholinergic side effects, which include: Dry mouth (xerostomia) Constipation Abdominal pain Diarrhea Abdominal cramping Dry eyes Appetite changes Thickening of bronchial secretions Urinary retention Pupil dilation Blurred vision Dermatologic Side EffectsThe Diphenhydramine in BENADRYL ® Allergy can cause drowsiness. What symptoms does Oral BENADRYL® Allergy relieve? Oral BENADRYL ® Allergy temporarily relieves indoor and outdoor allergy symptoms, such as sneezing; runny nose; itchy, watery eyes; and itchy nose or throat. What symptoms does Topical BENADRYL® Itch Stopping Cream relieve?Benadryl doses. Benadryl contains diphenhydramine which is mainly use in treatment of Allergies but, it can also be used in Insomnia, Cough, Common cold, Nausea. Diphenhydramine mainly acts via antagonizing H1 receptor but can also show anti cholinergic and anesthetic property. Normal Dose is 25-50 mg oral. Side Effects-. "/> The most common symptoms of Benadryl overdose that require immediate action are: 1. Anti-Cholinergic Symptoms Flushed, Hot, dry skin Dry mucous membranes Low-grade fever Dilated pupils Less sweating Blurred vision Sinus tachycardia Intestinal ileus Urinary retention 2. CNS Effects Epileptic patients suffering from repeated seizures Lethargy spectrum mobile sim card activation The most common side effects of Benadryl include: Behavioral changes (either sedation / sleepiness or agitation / excitement) Dry mouth Difficulty urinating Drooling Diarrhea Vomiting Decreased appetite Side effects could take up to an hour to …Side Effects What are the side effects of Benadryl (Diphenhydramine)?. Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips ... is it safe to leave stove on low Benadryl doses. Benadryl contains diphenhydramine which is mainly use in treatment of Allergies but, it can also be used in Insomnia, Cough, Common cold, Nausea. Diphenhydramine mainly acts via antagonizing H1 receptor but can also show anti cholinergic and anesthetic property. Normal Dose is 25-50 mg oral. Side Effects-. "/> 15 ian. 2022 ... Diphenhydramine: learn about side effects, dosage, special precautions, and more on MedlinePlus.Side effects of Benadryl in dogs Benadryl usage comes with several possible side effects, including: Lethargy /drowsiness Dry mouth or increased salivation Increased heart rate Rapid breathing Urinary retention Vomiting Diarrhea Loss of appetiteDiphenhydramine is given by mouth or as an injection and is used on and off label to treat allergic reactions, motion sickness, and to induce sedation. Side effects include sleepiness, and less commonly dry mouth and gastrointestinal upset. Diphenhydramine should not be used in pets that are allergic to this medication and should be used cautiously in pets with glaucoma, enlarged prostate ...Serious possible side effects can include thoughts of suicide or dying, suicide attempts, anxiety that’s new or gets worse, feeling restless or agitated, insomnia, irritability or aggression. Also possible are vision problems, …Jun 02, 2020 · Common side effects of Benadryl include: drowsiness, fatigue, tiredness, sleepiness, dizziness, disturbed coordination, constipation, dry mouth /nose/throat, difficulty urinating or an enlarged prostate, upset stomach, blurred vision, double vision, tremor, loss of appetite, headache, or nausea. tesla 2022 prices Oct 01, 2020 · If a person (a child or adult) takes too much Benadryl, they might have certain symptoms. 6  Common symptoms of a diphenhydramine overdose include Agitation Blurred vision Confusion Depression Difficult to wake or arouse Dry eyes Dry mouth Dry, red skin Enlarged pupils Hallucinations Inability to urinate Low blood pressure Nervousness These drugs help reduce allergy symptoms such as sneezing, itching, and runny nose. Common Side Effects of Antihistamine. Over-the-counter antihistamines come ...Note: This document contains side effect information about diphenhydramine / pseudoephedrine. Some of the dosage forms listed on this page may not apply to the brand name Benadryl Allergy Sinus. Applies to diphenhydramine / pseudoephedrine : oral liquid, oral tablet, oral tablet disintegratingBenadryl is used to temporarily ease symptoms that occur after exposure to poisonous plants. These include poison ivy, poison oak, and poison sumac. It’s recommended for this purpose in adults and children ages 2 years and older. The leaves of a poisonous plant may cause an allergic reaction in some people. speed vs ben fnf mod download Jul 11, 2018 · Other possible side effects of Benadryl, which can occur at any age, include: sleepiness restlessness fatigue headaches dizziness a sore throat dry mouth stomach discomfort nausea or diarrhea... Side effects of Benadryl Benadryl side effects in dogs are similar to those in humans. Common side effects include dry mouth, sleepiness, and urine retention. Some dogs may experience rare side effects, such as diarrhea, vomiting, rapid breathing, increased heart rate, and appetize changes. If these symptoms become severe, you should call your vet.Some side effects may be serious. If you experience any of the following symptoms, call your doctor immediately: vision problems; difficulty urinating or painful urination; Diphenhydramine may cause other side effects. Call your doctor if you experience any unusual problems while you are taking this medication.The recommended adult oral dose ranges from 25 to 50 mg three or four times daily. Common side effects include sedation, impairment of motor function, confusion, dizziness, blurred vision, dry mouth and throat, … how to frame a cycling jersey trouble breathing. diarrhea. difficult or painful urination. an increased need to urinate often. abdominal bloating. nervousness. a feeling of pins and needles on skin. a ... Another side effect of chicory root extract is that it can cause contact dermatitis. When a person comes in direct contact with the chicory plant, it can cause skin allergies in him producing symptoms such as skin irritation and itching. Before consuming the extract, the person should check for chicory root allergy. Drug Interactions a nurse is preparing a presentation at a community center about osteoarthritis Examples of mild side effects that have been reported with Benadryl include: sleepiness dizziness * headache low blood pressure constipation dry mouth or nose blurry vision *Benadryl’s common side effects are: For children, it may cause excitability The user of this product may experience marked drowsiness, and cause hives so those who are driving or operating machinery should watch out for this reaction. It is advised to avoid alcoholic drinks when using Benadryl as it may increase drowsiness. why is it so hard to get a ps5 reddit Summary. The most common side effects of Benadryl are drowsiness and dizziness. Other common but harmless reactions to diphenhydramine medications like Benadryl include dry mouth, diarrhea or constipation, thick chest mucus and heartburn. Many of these side effects can be easily treated with adequate hydration or other medications.Side Effects of Benadryl for Dogs. As with other drugs, Benadryl for dogs can be unsuitable for dogs with certain conditions and may cause side effects. Benadryl is contraindicated in dogs with angle-closure glaucoma, high blood pressure, cardiovascular conditions, allergic lung disease, bladder neck obstructions, prostatic hypertrophy.Note: This document contains side effect information about diphenhydramine. Some of the dosage forms listed on this page may not apply to the brand name Benadryl. For the Consumer. Applies to diphenhydramine: oral capsules and tablets, parenteral injection. Side effects include:The large majority of side effects associated from taking Benadryl are due to its action as an anticholinergic agent. Anticholinergic agents block the uptake of acetylcholine within the brain. This can lead to a variety of side effects. The most common is a dry mouth or dry throat. spokane private golf courses