Weeks 1-12 Prop 50mg ED

PCT:
weeks 1-7 20mg tamox
weeks 1 (.5mg) 2 (.5mg) 3 (.25mg) 4 (.25mg EOD) l-dex

Is it ok to run the l-dex with tamox? I have read that the tamox decreases the l-dex effectiveness. But the thing is the only pct I have available is whats available on AR-R, so I have to work with that.