Some allergy medications are safe for use but it is always best to discuss this with your doctor and pharmacist. Allergy medications come in various forms from pills to nasal spray. Your doctor and pharmacist can recommend one that is right for you.
decongestants usually come with bp warnings except chloro-tabs
This goes the same for cold medicines as well.
Ones with a "D" (for decongestant) in their brand name do.