Antihistamines are used to relieve or prevent the symptoms of hay fever and other types of allergy.
They work by preventing the effects of a substance called histamine, which is produced by the body.
Antihistamines are a type of medicine that's often used to treat a number of allergic health conditions.
However, they also cross the blood-brain barrier, interacting with a number of unintended receptor sites. While dangerous in itself, particularly for driving or operating machinery, this sedation also induces an unnatural sleep, interfering with the body’s recovering time, when the brain normally stores memories and retains learning.
For example, antihistamines may be used to treat: Many antihistamines are available over the counter at a pharmacy, although some require a prescription.
How antihistamines work Antihistamines work by altering the way cells are affected by a substance called histamine.
The sleepy feeling brought on by these antihistamines can lead to impaired psychomotor performance, cognitive functions and memory problems.
Avoid these drugs and their dangerous side effects by choosing natural allergy remedies to address your symptoms.
Also, the syrup form of diphenhydramine is used to relieve the cough due to colds or hay fever.