A few reviews on the phytochemistry, biology, toxicology, and pharmacology of the Zingiber and Alpinia genus have been published recently (Zhang et al., 2016
Remember: only escalate one compound at a time
A previous placebo-controlled study comparing orally administered tablets of phenylephrine or pseudoephedrine vs placebo support the conclusion that pseudoephedrine tablets are effective in reducing nasal congestion , whereas the effect produced by phenylephrine tablets are no different than placebo (Horak et al, 2009)
These effects are well-documented across multiple animal models of intestinal injury, ulcerative colitis, and inflammatory bowel disease
G., Mehri, S., & Hosseinzadeh, H