Not meaning to downplay how you feel, but like others said, heartbreak is a fairly natural human emotion. I don't think you'd need anti-depressants unless it continues for longer than it should, or if it gets worse. Most modern anti-depressants (e.g. SSRI's, SNRI's, DNRI's, etc.) should be fine to take with dex-amphetamine - I've taken them while on meth and dex-amphetamine and haven't had any adverse reactions. Older anti-depressants like tricyclics and MAOI's may cause some complications when combined with dex-amphetamine and should probably be avoided.