2C-B-BZP produces stimulant effects that last 3-6 hours, depending on the dose. Despite its structural similarity to 2C-B it does not produce psychedelic effects...
-wikipedia

Felt something not worth mentioning for a short while, then got a terrible headache a couple of hours later. Dose: 300 mg -hh339 (drugs-forum.co.uk)

Upon ingestion of between 50 mg and 200 mg of BZP, the user may experience (...) effects of BZP (which) are largely similar to, but much weaker than, amphetamines(...) Users report alertness, euphoria and a general feeling of well being.
-wikipedia

MeOPP (...) is usually taken at doses between 120 - 200mg. It does not produce prominent stimulant effects, but is instead said to be relaxing...
-wikipedia

However MDBZP is only a very mild stimulant, and does not produce euphoria, empathogenic or psychedelic effects.
-wikipedia

pFPP is active at doses between 20mg - 150mg, (it)has little stimulant effects (...) Its effects have been described as similar to a cross between Fluoxetine and a very small dose of LSD. -wikipedia

The effects of MBZP are very similar to those of BZP, but the stimulant effect is slightly weaker and it seems to have less of a tendency to cause negative side effects
-wikipedia

The dosage commonly used when combined with BZP for "ecstasy-like effects" is between 30 and 100 mg, while higher doses of TFMPP alone cause mildly hallucinogenic effects at around 100–250mg;-wikipedia

Trifluoromethyl analogs of amphetamine (I) and norephedrine (II) were synthesized for pharmacological evaluation. They showed no activity in profile tests for anorectic activity (I), antiemetic activity (I), CNS activity (I), MAO-inhibitory activity (I, II), and pressor activity (II).

mCPP(...) has shown up in legal alternatives to illegal stimulants (...), and pills sold as ecstasy. mCPP is known to induce headaches in humans(...) This has tended to limit the use of mCPP as a recreational drug
-wikipedia
the commonly used oral dose of mCPP ranges from 0.1 to 0.75 mg/kg (7 – 52.5mg mCPP for a 70-kg person) -Tancer&Johanson 2001

Befuraline has stimulant and antidepressant effects and has seen some use in Germany and France, although it has never become widely used. Befuraline has an active metabolite benzylpiperazine, which is responsible for its stimulant effects. -wikipedia

Piberaline fumarate (EGYT-475, Trelibet) is a piperazine derivative drug invented in the 1980s. It has stimulant and antidepressant effects which are thought to be due largely to its active metabolite benzylpiperazine. -wikipedia

Cyclizine is a piperazine derivative with histamine H1-receptor antagonist (antihistamine) activity.(...)In the UK the drug was removed from the shelves as an OTC preparation in the mid 80s because of it's interaction with opiates. It served to increase the 'flash' of injected opiates. Since opiate users would regularly use high doses, the number of ER room admissions due to seizures became a notable public health risk. Even so, the drug remains available on the internet and pockets of abuse still exist in the UK.-wikipedia

Etoperidone is an atypical antidepressant, is a 5-HT2 receptor antagonist(...) In the 1970's it was a popular drug used to impede the effects of LSD.-wikipedia

Vanoxerine(...) is a potent and selective dopamine reuptake inhibitor. GBR-12909 binds to the target site on the dopamine reuptake transporter around 500 times more strongly than cocaine, but has only mild stimulant effects, because as well as inhibiting the reuptake of dopamine, GBR-12909(...) has been researched for use in treating cocaine dependence, both as a substitute for cocaine and to block the rewarding effects. -wikipedia

BZP, TFMPP and m-CPP fully substituted in S(+)-MDMA-trained animals, but did not elicit significant drug lever responding in mice trained to discriminate R(-)-MDMA. m-MeO-BZP partially substituted for both training drugs.

Also folgende Piperazine sind auf jeden fall Psychoaktiv und werden auch verwendet:

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