You can definitely get addicted to baclofen, it’s a full GABA B agonist. It is very similar to phenibut, and looks almost identical molecularly to phenibut with very similar effects and actions. There is a debate here on whether baclofen is a gabapentinoid like phenibut or not? I assert that it absolutely is a gabapentinoid, while others say it absolutely is not. It acts amount exactly like phenibut and has an almost identical high, but it does not act as a gabapentinoid in the doses they prescribe therapeuticly. Where it differs from phenibut is that it’s onset of action is really quick compared to phenibut that takes 90 min to 2 hours before you feel the effects. Tolerance also develops much slower than phenibut, where tolerance happens very quickly.
The thing is with baclofen is to not stop it abruptly. Baclofen withdrawal is usually only seen with abrupt discontinuation of the intrathecal form. Withdrawal from baclofen can have clinical manifestations that include agitation, insomnia, confusion, delusions, hallucinations, seizures, visual changes, psychosis, dyskinesia, hyperthermia, and increased spasticity.
Baclofen can be easily tapered off of too. If the baclofen is to be ceased for any reason, the dose should be weaned down over 1-2 weeks. A ballpark figure would be 10mg/day decrease for doses over 100mg/day and 5-10mg/day for doses under 100mg/day.