anxiety
24 interactions related to anxiety
lemon balm + valerian
Lemon balm (Melissa officinalis) and valerian (Valeriana officinalis) both modulate the GABAergic system but through different mechanisms — valerian's valerenic acid acts directly on GABA-A receptors while lemon balm's rosmarinic acid inhibits GABA transaminase to preserve GABA in the synapse — and the combination has been studied for restlessness, dyssomnia, and sleep quality.
caffeine + ashwagandha
Ashwagandha is an adaptogen that lowers cortisol and reduces perceived anxiety; caffeine is a stimulant that raises cortisol and can increase anxiety. Taking them together can blunt caffeine's anxiety and jitter side effects while preserving its alertness benefit, but ashwagandha may also slightly dampen caffeine's peak stimulant effect.
fluoxetine + kava
Kava carries a documented risk of hepatotoxicity and produces CNS depression, and combining it with fluoxetine raises the risk of additive sedation and liver injury. Kava also inhibits CYP2D6 and CYP3A4, the enzymes that metabolize fluoxetine, which can elevate fluoxetine levels and side effects.
sertraline + kava
Kava (Piper methysticum) has central nervous system depressant effects and a documented risk of hepatotoxicity, and combining it with sertraline raises the risk of additive sedation and liver injury. Sertraline itself is associated with hepatic adverse effects in a small subset of users, and stacking hepatotoxic agents is discouraged.
alprazolam + kava
Kava contains kavalactones that potentiate GABA-A receptor binding, producing additive CNS depression when combined with alprazolam, a benzodiazepine that also enhances GABA-A activity. A published case report describes a 54-year-old man who became semi-comatose after taking alprazolam with kava for three days.
ashwagandha + magnesium
Ashwagandha modulates the HPA stress axis and lowers cortisol while magnesium acts as a cofactor for GABAergic and parasympathetic relaxation pathways, giving complementary mechanisms for sleep and stress support.
ashwagandha + l-theanine
L-theanine acts within 30-60 minutes to increase alpha brain waves and modestly elevate GABA, producing immediate relaxation without sedation. Ashwagandha builds resilience over weeks by lowering cortisol and modulating the HPA axis. Combined, the pair delivers both fast-acting calm and longer-term stress resilience. Direct combination trials in humans are limited; the rationale is mechanistic.
gaba + l-theanine
GABA and L-theanine combined produce a synergistic effect on sleep onset and quality that neither produces alone. A 2019 study in Pharmaceutical Biology showed the mixture decreased sleep latency by roughly 20% and increased non-REM sleep duration by roughly 20% compared to either ingredient alone. A 2023 human study found improvements in sleep quality scores with the combination.
passionflower + lemon balm
Passionflower (Passiflora incarnata) contains flavonoids that act as positive modulators at the GABA-A receptor benzodiazepine site, while lemon balm (Melissa officinalis) inhibits GABA transaminase, the enzyme that breaks down GABA. The two herbs raise GABAergic tone through complementary mechanisms - one boosts receptor activity, the other extends GABA's half-life - which is the basis for several traditional anxiolytic and sleep formulas.
alcohol + venlafaxine
Venlafaxine (Effexor) is an SNRI that, like other antidepressants, has additive CNS-depressant effects with alcohol. The FDA-approved label warns patients to avoid alcohol because of worsening drowsiness, dizziness, impaired judgment, and the potential to aggravate the underlying mood or anxiety disorder.
caffeine + propranolol
Caffeine raises systemic vascular resistance and heart rate, partially opposing propranolol's blood-pressure and heart-rate lowering effects. High caffeine intake can also worsen tremor and anxiety that propranolol is prescribed to treat.
caffeine + sertraline
Sertraline and caffeine can each contribute to anxiety, insomnia, tremor and GI upset, and sertraline may modestly slow caffeine clearance via CYP1A2 inhibition. The pharmacokinetic effect is small but the additive symptomatic effect can be uncomfortable.
smoking + caffeine
Polycyclic aromatic hydrocarbons in tobacco smoke induce CYP1A2, the enzyme that performs about 95% of caffeine demethylation, raising caffeine clearance by 40-65% and shortening its half-life from roughly 6 hours to 3.5 hours in smokers. Quitting smoking can cause caffeine levels to rise sharply, contributing to jitters, anxiety, palpitations, and insomnia.
valerian tea + benzodiazepines
Valerian (Valeriana officinalis) modulates GABA-A receptors, the same target as benzodiazepines, producing additive central nervous system depression. Co-use can cause excessive sedation, impaired psychomotor performance, and prolonged drowsiness, especially with alcohol or in older adults.
coffee + sertraline
Sertraline modestly inhibits CYP1A2-mediated caffeine metabolism, raising caffeine plasma levels and prolonging its half-life. Caffeine can also worsen the anxiety, insomnia, jitteriness, and palpitations that sertraline is often prescribed to treat, blunting the clinical response.
ginseng + caffeine
Panax ginseng has its own mild stimulant and sympathomimetic activity that adds to caffeine's effects on heart rate, blood pressure, and CNS arousal. The combination can produce jitteriness, insomnia, palpitations, anxiety, and elevated blood pressure, with greater risk in people with hypertension, arrhythmia, or anxiety disorders.
alcohol + valerian
Valerian root acts on GABA-A receptors and may inhibit GABA breakdown, producing sedative effects that are additive with alcohol's CNS depressant effects. The combination produces increased drowsiness, impaired psychomotor performance, and risk of falls, particularly in older adults.
vitamin b6 + magnesium
Vitamin B6 enhances cellular uptake and retention of magnesium and supports magnesium-dependent enzyme activity, while magnesium is required for the conversion of B6 to its active PLP form. Clinical trials in PMS, stress, and anxiety show the combination reduces symptoms more than magnesium alone.
caffeine + adderall
Caffeine and amphetamine salts are both sympathomimetic stimulants. Combining them raises heart rate and blood pressure, worsens anxiety and insomnia, and increases the risk of palpitations, arrhythmias and panic attacks.
caffeine + yohimbine
Caffeine and yohimbine are both potent stimulants. Yohimbine blocks alpha-2 adrenergic receptors, raising norepinephrine, while caffeine blocks adenosine receptors and amplifies sympathetic output. Combined, they can cause large rises in heart rate and blood pressure, severe anxiety, tremor, panic attacks, arrhythmias, and have been linked to hospital visits and rare cardiovascular events.
coffee + antidepressants
Many antidepressants (especially fluvoxamine, fluoxetine, sertraline, duloxetine) inhibit CYP1A2 to varying degrees and slow caffeine clearance, while caffeine itself can worsen the anxiety, insomnia, tremor, and tachycardia that antidepressants are often prescribed to treat. MAOIs add a risk of caffeine-induced hypertensive episodes.
saffron + curcumin
Saffron (Crocus sativus) and curcumin both have antidepressant effects through complementary mechanisms: saffron modulates serotonin reuptake and increases BDNF, while curcumin reduces neuroinflammation and supports monoamine balance via MAO inhibition and HPA-axis modulation. A randomized placebo-controlled trial in major depressive disorder showed the combination was effective in reducing depressive and anxiolytic symptoms.
rhodiola + ashwagandha
Rhodiola rosea and Ashwagandha are both adaptogens but act through different mechanisms: Rhodiola primarily provides an energizing, anti-fatigue effect via modulation of monoamines and the HPA axis, while Ashwagandha reduces cortisol and has a calming, sleep-supportive effect. Combined, they cover both the activating and the relaxing arms of the stress response.
grapefruit + buspirone
Buspirone undergoes extensive first-pass metabolism by intestinal and hepatic CYP3A4. A controlled study showed grapefruit juice increased buspirone AUC 9.2-fold and peak plasma concentration 4.3-fold, dramatically amplifying sedation, dizziness, and serotonergic effects.