Can You Take Caffeine and Phenibut Together?

Dose or timing may matter

The short answer

Caffeine's stimulation may partially counteract phenibut's GABAergic sedation, reducing the intended effect of either.

How to arrange timing

Separate by several hours depending on intended effect.

Reference

Reference noted for this combination: Lapin, 2001, Eur Neuropsychopharmacol

Important context

Whether supplements suit you together also depends on dose, product formulation, health conditions, and medication use. Ask a doctor or pharmacist first if you take medication, are pregnant or breastfeeding, or have a chronic condition.