Allergies occur when your immune system erroneously thinks an innocuous foreign substance, such as pollen or pet dander, is actually dangerous.

They also make blood vessels more permeable, allowing proteins and white blood cells to seep into the damaged or infected tissue.

But there are side effects to this healing process.

Researchers have conducted many studies of diphenhydramine for insomnia, but most have been small.

One of the larger studies looked at individuals with an average age of 44 years who had mild insomnia.

The result was tolerance to both the sedation and anti-histamine effects.

On one occasion this person needed to be hospitilized with a allergic reaction of unknown origin and the hydroxazine and diphenhydramine drips barely helped at all.

Even pot doesnt help me sleep and pot used to always make me dead tired. maybe im just getting older I abuse benadryl semi-regularly as a deleriant, and sometimes during/after stim use as a sleep aid.

Haven't noticed anything so far, except that the hangovers can last for like a week.

For example, when you're fighting a cold (the rhinovirus), histamines widen the blood vessels in your nasal cavity, causing nasal congestion.