A food allergy can cause different symptoms in different parts of the body at the same time. These include: People often confuse food allergies & food intolerances, but the two are actually completely different If you or your child has taken monoamine oxidase inhibitors (MAOIs) prescribed for depression in the last 14 days. Tell your doctor right away if you have any serious side effects, including: mental/mood changes (such as restlessness, confusion), trouble urinating, fast/irregular heartbeat. If your doctor has prescribed this medication, remember that your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

You may also be put on a food elimination diet, which, if you have a food allergy, should never be tried without discussing with a qualified healthcare professional. In a food elimination diet, the food suspected of causing the allergic reaction is removed from the diet for two to six weeks. The food is then slowly reintroduced, and any symptoms monitored. To minimize dizziness and lightheadedness, get up slowly when rising from a sitting or lying position. Patients with renal or hepatic impairment should seek doctor's advice prior to taking this medicine. (see section 4.4 Special warnings and precautions for use). Can I take Promethazine 25 Allergy Relief (Apohealth) in sport? Find out on the Sport Integrity AustraliaDrowsiness, dizziness, constipation, stomach upset, blurred vision, or dry mouth/nose/throat may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly. If you are taking other medicines containing antihistamines, including products for the relief of colds and coughs. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch. Concurrent use with drugs which cause sedation such as anxiolytics and hypnotics may cause an increase in sedative effects, therefore medical advice should be sought before taking chlorphenamine concurrently with these medicines. Carcinogenesis and mutagenesis: In a 2-year carcinogenicity study in rats, cetirizine was not shown to be carcinogenic at dietary doses up to 20 mg/kg (approximately 15 times the maximum recommended daily oral dose in adults). In a 2-year carcinogenicity study in mice, cetirizine administration lead to an incidence of benign liver tumors in males at a dietary dose of 16 mg/kg (approximately 6 times the maximum recommended daily oral dose in adults). The clinical significance of these findings during long-term use of cetirizine is unknown at this time .

If you are persistently getting diarrhoea, bloating, stomach pain or skin rashes, you should see your GP. They can help to rule out other health problems that have similar symptoms and may take blood tests. Children and the elderly are more susceptible to neurological anticholinergic effects and paradoxical excitation (e.g. increased energy, restlessness, nervousness)Seek advice before using if you are breast feeding, pregnant, planning to become pregnant, or suffer from allergies. There are no specific tests for food intolerances. To find out if you have one, you'll need to keep an eye on your symptoms and the food you eat. Antihistamines can be used to treat the symptoms of a mild to moderate allergic reaction to food. A number of antihistamines are available over the counter without a prescription. Make sure you always have these at hand, in case you eat the food by mistake. Some over-the-counter antihistamines are not suitable for children under two. Speak to your GP if you have a young child with a food allergy for advice on what antihistamine might be suitable.

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The targeted foods can then be gradually reintroduced to see if the symptoms return. You may find you can tolerate a certain amount and only have symptoms if you go over this amount.