When i glanced through these drugs, it seems to me that there are no significant interactions among them.
But i am just curious, do you mean
tamoxifen for Tamox? I can see that Salvent, Qvar,
Serevent and
Atrovent are for emphysema while Levocarb is for Parkinsons, but i have no ideas on the use of tamoxifen for either of these two problems.