why do psychiatrists talk so much about serotonin/ norepinephrine /dopamine and so little about gaba / glutamate / histamine?
chatgpt notes for myself wrt bipolar: Here’s a list of neurotransmitters that are most disrupted in bipolar disorder, ranked by their degree of divergence from typical brain function, and how drugs (legal and recreational) and lifestyle factors affect them: ### **1. Glutamate (Excitatory)** - **Disruption**: - **Mania**: Excessive glutamate activity. - **Depression**: Reduced glutamate activity. - **Impact of Drugs**: - **Mood stabilizers** (Lithium, Valproate): Normalize glutamate levels. - **Ketamine** (low dose): Rapid antidepressant effect by modulating glutamate. - **Alcohol**: Initially reduces glutamate activity, but chronic use increases it, worsening mood swings. - **Recreational drugs**: **Cocaine, MDMA** can exacerbate glutamate excess, worsening mania. - **Lifestyle**: - **Sleep deprivation**: Increases glutamate activity, increasing risk of mania. - **Stress**: Elevates glutamate and worsens mood swings. - **Exercise**: Can help stabilize glutamate, improving mood and cognitive function. ### **2. GABA (Inhibitory)** - **Disruption**: - **Low GABA** in both manic and depressive states, leading to poor inhibition of excitatory circuits. - **Impact of Drugs**: - **Benzodiazepines** (Xanax, Valium): Boost GABA activity to reduce anxiety and stabilize mood. - **Alcohol**: Temporarily boosts GABA but long-term use reduces GABA function, increasing instability. - **Pregabalin (Lyrica)**, **Gabapentin (Neurontin)**: Modulate GABA to reduce anxiety and stabilize mood, but effects are indirect. - **Lifestyle**: - **Exercise**: Increases GABA levels, especially aerobic activity. - **Mindfulness and meditation**: Shown to enhance GABA levels, reducing stress and anxiety. - **Sleep**: Poor sleep reduces GABA, exacerbating anxiety and mood swings. ### **3. Dopamine (Excitatory/Inhibitory)** - **Disruption**: - **Mania**: Excess dopamine activity (euphoria, impulsivity). - **Depression**: Decreased dopamine activity (low motivation, anhedonia). - **Impact of Drugs**: - **Antipsychotics** (Olanzapine, Risperidone): Block dopamine receptors to reduce manic symptoms. - **Stimulants** (Cocaine, Amphetamines, MDMA): Increase dopamine and can trigger manic episodes. - **Bupropion** (Wellbutrin): Boosts dopamine, useful in depressive phases without risk of mania. - **Nicotine**: Increases dopamine and can lead to mood swings with withdrawal. - **Lifestyle**: - **Exercise**: Boosts dopamine, especially intense physical activity. - **Diet**: Foods high in **tyrosine** (dopamine precursor) like almonds, bananas, and avocados help maintain dopamine balance. - **Sleep**: Sleep loss impairs dopamine, increasing the risk of mood swings.