Do not take. If your have ever had an allergic reaction to diphenhydramine hydrochloride or any of the other ingredients. If you have an obstruction in your stomach or gut for example, because of an ulcer. If you are pregnant, breast feeding or receiving prescribed medicines.
If your sleeping difficulties persist, see your doctor. Warning: this medicine may make you sleepy. If this happens do not drive or use tools or machines. Do not drink alcohol. This is a medicine; Consult your doctor or pharmacist if you have an underlying medical condition, are taking any other medication or complementary therapy, or if symptoms persist.
Seek advice before using if you are breast feeding, pregnant, planning to become pregnant, or suffer from allergies. Keep out of reach of Children.
Storage Store in a dry place. Precautions This is a medicine; Consult your doctor or pharmacist if you have an underlying medical condition, are taking any other medication or complementary therapy, or if symptoms persist.
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Maximum quantity reached. In stock. Most people prefer to take a non-drowsy antihistamine as it's less likely to interfere with their everyday routine. You might choose to take a drowsy antihistamine, however, if you're having problems falling asleep, or if symptoms like itching or coughing are keeping you awake.
There is not enough information to say whether one antihistamine is better than another for treating allergies. You may need to try a few different medicines to find what works best for you. Ask your pharmacist or doctor for advice if you're unsure. Diphenhydramine blocks the effects of a natural chemical called acetylcholine. This can help dry up a cough or runny nose but can also cause side effects such as a dry mouth and dry nose. Some cough and cold remedies claim to suppress your cough or stop you bringing up phlegm.
Although some people find them helpful, they're not usually recommended. This is because there's little evidence that they're any more effective than simple home remedies, and they're not suitable for everyone. Yes, you can take diphenhydramine together with painkillers such as paracetamol or ibuprofen. If you take diphenhydramine with painkillers that contain codeine such as co-codamol or other prescription painkillers, you may feel very tired and sleepy.
Do not drive, ride a bike or operate machinery or tools if this happens to you. It's important to check the packaging or label of your medicine carefully. This is because some diphenhydramine products already contain a painkiller. Do not take extra painkillers if this is the case, as there's a risk of overdose. Speak to your pharmacist if you're not sure whether a medicine already contains a painkiller. Do not drive a car or ride a bike if diphenhydramine makes you sleepy during the day, gives you blurred vision or makes you feel dizzy, clumsy or unable to concentrate or make decisions.
This may be more likely when you first start taking diphenhydramine but could happen at any time, for example when starting another medicine. It's an offence to drive a car if your ability to drive safely is affected. It's your responsibility to decide if it's safe to drive. If you're in any doubt, do not drive.
Talk to your doctor or pharmacist if you're unsure whether it's safe for you to drive while taking diphenhydramine. UK has more information on the law on drugs and driving. There's no evidence to suggest that taking diphenhydramine reduces fertility in either men or women. Diphenhydramine does not affect any type of contraception including the combined pill and emergency contraception.
Alcohol and diphenhydramine together can make you sleep very deeply. You will not be able to breathe properly and you may have difficulty waking up. However, do not drink alcohol. If you are taking diphenhydramine to help you sleep, you should also try not to drink anything that contains caffeine, such as coffee, tea, cola or energy drinks.
Caffeine has the opposite effect to diphenhydramine on your body and can stop it working. There are a number of things you can try to help yourself have a good night's sleep :. If you have hay fever, it will help if you do not spend too much time outside when the pollen count is high. The best way to prevent any sort of allergic reaction is to avoid the substance that you're allergic to, if you can.
There are some practical steps you can follow to help you avoid common allergens. Page last reviewed: 14 October Next review due: 14 October Diphenhydramine - Brand name: Nytol Original On this page About diphenhydramine Key facts Who can and cannot take diphenhydramine How and when to take or use diphenhydramine Side effects How to cope with side effects of diphenhydramine Pregnancy and breastfeeding Cautions with other medicines Common questions about diphenhydramine.
About diphenhydramine Diphenhydramine is an antihistamine medicine that relieves the symptoms of allergies. It's used for: short-term sleep problems insomnia , including when a cough , cold or itching is keeping you awake at night cough and cold symptoms hay fever eczema , hives urticaria and insect bites and stings You can buy diphenhydramine from pharmacies and it is also available on prescription.
Help us improve our website Can you answer a quick question about your visit today? To help you sleep, you'll usually take diphenhydramine 20 minutes before you go to bed. It normally takes about 30 minutes to work. Common side effects include feeling sleepy, dizzy or unsteady on your feet.
You may also have difficulty concentrating and have a dry mouth. You can become dependent on diphenhydramine if you take it continuously for a period of time. It may also stop working as well. Speak to your doctor if you need to take it for more than 2 weeks. Do not drink alcohol while taking diphenhydramine. Alcohol increases the risk of side effects. Giving diphenhydramine to children For cough and cold symptoms, you can give diphenhydramine tablets and liquid to children over the age of 6.
You can also use diphenhydramine cream on children for: insect bites and stings eczema. Important: Warning for children Do not give your child diphenhydramine to help them get to sleep. Who may not be able to take diphenhydramine Diphenhydramine is not suitable for some people. To make sure it's safe for you, tell your doctor or pharmacist if you: have ever had an allergic reaction to diphenhydramine or any other medicine have lung problems, such as asthma or chronic obstructive pulmonary disease COPD , or an illness that creates a lot of phlegm have an eye problem called primary angle closure glaucoma have a blockage in your stomach or gut have kidney or liver problems have problems peeing or emptying your bladder have epilepsy or any other health problem that causes fits seizures are due to have an allergy test — diphenhydramine can affect your results, so you may need to stop taking it a few days before your test — ask a pharmacist or your doctor for advice are unable to have any alcohol — some liquid diphenhydramine products contain a small amount of alcohol, so check the ingredients and the packaging carefully.
Dosage If you're aged over 65, start with the lower dose, as you may be more likely to get side effects. Dosage for short-term insomnia Diphenhydramine comes as 25mg and 50mg tablets. Dosage for cough and cold symptoms Diphenhydramine comes mixed with other medicines to treat the symptoms of coughs and colds. Dosage for hay fever and allergies Diphenhydramine comes as 25mg and 50mg tablets.
Dosage for insect bites, stings and eczema Diphenhydramine comes as a cream which you use once or twice a day. How to take or use it You can take diphenhydramine tablets and liquid with or without food. How to take diphenhydramine tablets Always take your diphenhydramine tablets with a drink of water.
How to take diphenhydramine liquid Liquid medicines containing diphenhydramine come with a plastic syringe or spoon to help you measure the right dose. How to use diphenhydramine cream With the cream, put a small amount onto the affected area and smooth it in gently.
What if I forget to take or use it? What if I take or use too much? Too much diphenhydramine can be dangerous. If you've taken more than the usual dose you may: feel very sleepy feel sick nauseous get blurry eyesight feel your heart beating very fast In serious cases you can become unconscious and may need emergency treatment in hospital.
Urgent advice: Contact for advice if:. Common side effects Common side effects happen in more than 1 in people. Talk to your doctor or pharmacist if these side effects bother you or do not go away: feeling sleepy, or drowsy, during the daytime dry mouth feeling dizzy or unsteady on your feet, or having difficulty concentrating Diphenhydramine cream can sometimes make your rash worse.
Serious side effects. Urgent advice: Contact for advice now if:. Immediate action required: Call if:. Serious allergic reaction In rare cases, it's possible to have a serious allergic reaction anaphylaxis to diphenhydramine. Other side effects These are not all the side effects of diphenhydramine.
As well, some forms of this medication may not be used for all of the conditions discussed here. Your doctor may have suggested this medication for conditions other than those listed in these drug information articles. If you have not discussed this with your doctor or are not sure why you are taking this medication, speak to your doctor.
Do not stop taking this medication without consulting your doctor. Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.
Nonmedicinal ingredients: cornstarch, lactose, microcrystalline cellulose, silicon dioxide, and stearic acid. Each blue, coated caplet, imprinted with "Nytol" on one side, contains diphenhydramine HCl 50 mg.
Each clear, light yellow, soft gel capsule, imprinted with a white "N" on one side, contains diphenhydramine HCl 50 mg. Nonmedicinal ingredients: edible ink, gelatin, glycerin, polyethylene glycol, sorbitol, and water.
The usual dose for adults and children 12 years of age and older to help with sleep is 25 mg to 50 mg taken by mouth at bedtime. Some people may only need to take 25 mg at bedtime if they are drowsy in the morning e. Many things can affect the dose of a medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
Do not dispose of medications in wastewater e. Ask your pharmacist how to dispose of medications that are no longer needed or have expired. Many medications can cause side effects. A side effect is an unwanted response to a medication when it is taken in normal doses. Side effects can be mild or severe, temporary or permanent. The side effects listed below are not experienced by everyone who takes this medication.
If you are concerned about side effects, discuss the risks and benefits of this medication with your doctor. Many of these side effects can be managed, and some may go away on their own over time.
Contact your doctor if you experience these side effects and they are severe or bothersome. Your pharmacist may be able to advise you on managing side effects.
Although most of the side effects listed below don't happen very often, they could lead to serious problems if you do not seek medical attention.
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