I've completely lost my appetite since being on adderall (dextroamphetamine and racemic amphetamine) 45mg a day. is it safe to take periactin with it to help increase my appetite?

Why are you on Adderall (dextroamphetamine and racemic amphetamine)?: It is never a good idea to follow one drugs complications with taking another drug which will only lead to taking another drug. Who put you on Adderall (dextroamphetamine and racemic amphetamine) and why? You should be discussing any complications you have with the medication with that particular practitioner. Unfortunately, medications like Adderall (dextroamphetamine and racemic amphetamine) are ridiculously overprescribed. Hopefully you have been prescribed by a competent practitioner for the right reasons.

Yes: Periactin (cyproheptadine hydrochloride) is an antihistamine with appetite stimulating properties. I have used it for almost 4decades to treat the appetite suppression due to stimulant medications.