However, cottonmouth suggests that cannabis does dry out mucous membranes (well, duh!). The anti-inflammatory properties are well documented, as are the bronchodilator effects in asthma. It would seem logical that cannabis would have an effect on allergic reactions. Sadly, I have found not a single bit research on this particular topic, but I'll keep looking! Asthma, which can be caused by allergies, however, I have a number of!

The Cannabinergic System as a Target for Anti-inflammatory Therapies
IngentaConnect The Cannabinergic System as a Target for Anti-inflammatory Therap...

Acute and subacute bronchial effects of oral cannabinoids.
Clinical Studies and Case Reports

Comparison of bronchial effects of nabilone and terbutaline
Clinical Studies and Case Reports

Bronchial effects of aerosolized delta 9-tetrahydrocannabinol
Clinical Studies and Case Reports

Bronchodilator effect of delta1-tetrahydrocannabinol administered by aerosol
Clinical Studies and Case Reports

Effects of smoked marijuana in experimentally induced asthma.
Clinical Studies and Case Reports

Marijuana and oral delta9-tetrahydrocannabinol on specific airway conductance
Clinical Studies and Case Reports

New Synthetic Delta-9-THC Inhaler Offers Safe, Rapid Delivery
New Synthetic Delta-9-THC Inhaler Offers Safe, Rapid Delivery, Phase I Study

Smoked marijuana and oral delta-9-THC on specific airway conductance in asthmatic subjects
Acute effects of smoked marijuana and oral delta-9-tetrahydrocannabinol on specific airway conductance in asthmatic subjects

I'd try running searches on the doctor's names. Quite often, they will be specializing in a certain area, and will have several related papers. Wish I could have helped more! - Granny:hippy: