What happens if you take two antihistamines

These two types may lead to different reactions if a person takes too much. First generation antihistamines are more likely to cross the blood-brain barrier. This means they can make people dizzy or drowsy, even in normal doses. Second generation antihistamines are newer drugs and are less likely to have these effects. Nonetheless, people can overdose on both types. Some experts say first generation antihistamines are more likely to result in death from accidents or overdoses than their second generation counterparts.

These newer antihistamines are less likely to cause drowsiness and dizziness. Research has found them less likely to cause dangerous effects if a person takes too much. Antihistamines are typically safe when a person takes the correct amount. However, as with any medication, they can cause serious adverse effects if someone takes too much.

People must keep antihistamines and all medications out of reach of children. Some antihistamines are safe for children to take, but it is important to ask a doctor or pharmacist about the right dose. Different antihistamines have different dosages. It is vital to read labels carefully to be sure a person is not taking too much. Dioxins are chemical compounds that are hazardous to health.

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Learn more about the health effects of gasoline exposure here. Anyone who may have overdosed on Prozac should receive emergency care, and most people fully recover.

Here, learn about the symptoms and what to do. Small pieces of plastic called microplastics can travel through wastewater into the ocean, where animals may eat them. Learn about plastics in seafood…. Antihistamine overdose: What to know and what to do. Can you overdose? He took twice the dose recommended by his physician due to trouble sleeping. Instead of becoming drowsy, he was quite restless. He called Poison Control in the middle of the night and was advised that antihistamines may sometimes cause restlessness instead of drowsiness, especially in higher doses.

Poison Control recommended that he speak with his doctor about an alternative medication for sleep. Allergens and Pollen CDC. Allergy medicines for children AAP. Dosing table for diphenhydramine e. Food Allergies. The Bottom Line Antihistamines are medicines to treat allergic reactions to pollen, dust, pet dander, foods, and medications. The Full Story Are you one of the 50 million people in the U. The older first-generation antihistamines are also called sedating antihistamines.

They cause much more drowsiness and fatigue than the newer antihistamines. In fact, these antihistamines sometimes are used as sleeping pills. Side effects can include dizziness, poor coordination, dry mouth, nausea and vomiting, blurred vision, and trouble urinating. The newer second and third-generation or non-sedating antihistamines are used much more frequently.

Usually, they don't cause drowsiness. In high doses, these antihistamines can still cause drowsiness and rapid heart rate. Do NOT "double-up" on a dose. Do NOT take a dose sooner than you're supposed to. Do NOT take two different antihistamines at the same time. Instead, talk to your doctor or pharmacist if you have trouble finding a drug that works well for your allergy symptoms. Be aware: Taking too much can be harmful for children and adults. Be sure to check the label for the correct dose.

This can cause seizures and hallucinations. Some antihistamines are combined with pain medicine. Taking another pain medicine at the same time could cause an overdose.

Some antihistamines are combined with decongestants. Taking another decongestant at the same time could cause an overdose. Follow these guidelines when using antihistamines: Read labels carefully. Some antihistamines should not be used for children. Some antihistamines can interact with other medicines. Check with your doctor or pharmacist or call Poison Control and speak with a Specialist if you have questions. Certain supplements may alleviate symptoms. Research suggests quercetin, a bioflavonoid derived from plant sources, helps inhibit histamine release.

Vitamin C, bromelain, butterbur, and apple cider vinegar may also help to boost your immune system so it can better respond to allergens. Lifestyle changes such as reducing your exposure to allergy triggers or using a HEPA air filter can help to reduce your reaction during peak allergy season.

Skip to main content Search for a topic or drug. Is it safe to take an antihistamine every day? By Heidi Borst Mar. Top Reads in Health Education.

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