Does fennel act like black licorice? i have read that licorice affects blood pressure meds and is not good for cardiac patients.fennel is in tulsi tea

No, totally diff.: While fennel tastes like licorice it is a very different plant with diff. effects. Licorice has many benefits but has glycyrrhizic acid, which in LARGE amounts can raise blood pressure. Fennel not only does not raise blood pressure, it lowers it. To learn about its benefits see https://draxe.com/fennel-benefits-nutrition-fantastic-recipes/