Ottawa County Recovery Resource and Education Hub

· How it works

Classification and primary mechanism

Kava is a botanical prepared from the rhizome of Piper methysticum. Its active kavalactones, including kavain and methysticin, have multimodal non-opioid effects: they modulate GABA-A signaling, block voltage-gated sodium and calcium channels, and may influence monoamine systems. This can produce relaxation, oral numbness, muscle relaxation, and sedation.

· Immediate effects

Recognize the effects

Signs of Use

Relaxation, drowsiness, and slowed responses
Tingling or numbness of the mouth and tongue
Muscle relaxation, impaired coordination, or dizziness
Nausea, stomach upset, headache, or skin changes with repeated heavy use
Confusion, extreme sleepiness, or slowed breathing after high doses or combinations

Short Term

Reduced anxiety and subjective tension
Sedation, impaired driving, and decreased coordination
Atypical sensory effects such as mouth numbness and altered perception
Loss of consciousness or breathing problems when combined with other depressants

Long Term

Tolerance, psychological dependence, and withdrawal-like symptoms after heavy use
Dry, scaly skin rash associated with prolonged high intake
Potential liver injury, especially with concentrated extracts, contaminated products, or underlying liver disease
Nutritional and medication-related complications from frequent heavy use

· Long-term consequences

Dangerous interactions

Do not combine kava with alcohol, benzodiazepines, opioids, carisoprodol, gabapentin, pregabalin, sleep medicines, or other sedatives. Kava may intensify central nervous system depression and may affect how the liver processes medications. People with liver disease or those taking hepatotoxic medicines should consult a clinician before use.

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