Several options can help calm anxiety, ranging from supplements and teas you can buy today to prescription medications that work on a longer timeline. What works best depends on whether you need relief in the next hour or a lasting reduction in baseline anxiety over weeks and months. Here’s what the evidence supports.
Supplements With Clinical Evidence
Three supplements stand out for anxiety relief, each working through different mechanisms.
L-theanine is an amino acid found naturally in green tea. It works by interacting with GABA receptors in the brain (the same calming system that anti-anxiety medications target) and by modulating glutamate, a brain chemical involved in stress responses. Most people notice a subtle relaxation within 30 to 60 minutes of taking it. Doses in clinical studies typically range from 200 to 400 mg. It doesn’t cause drowsiness at those levels, which makes it a practical option for daytime anxiety.
Ashwagandha takes a different approach. It lowers cortisol, the hormone your body pumps out when you’re stressed. In a clinical trial of 130 adults with self-reported stress, those taking ashwagandha root extract for 60 days had significantly lower anxiety scores on two validated rating scales compared to placebo. They also had measurably lower cortisol levels. A dose of 225 mg or more daily, taken consistently for several weeks, is the pattern most studies follow. The branded extract KSM-66 and sustained-release formulations like Prolanza are the ones with the strongest trial data behind them.
Magnesium glycinate is worth considering if your diet is low in magnesium, which is common. Magnesium plays a role in regulating your nervous system, and deficiency is linked to increased anxiety. The glycinate form pairs magnesium with the amino acid glycine, making it easier for your small intestine to absorb compared to cheaper forms like magnesium oxide. Glycine itself has mild calming properties. Most adults can safely take 200 to 400 mg of elemental magnesium daily, though checking with a doctor first is reasonable if you have kidney issues or take other medications.
Chamomile Tea as a Daily Habit
Chamomile isn’t just folk wisdom. The active compound, apigenin, binds to the same brain receptors that promote relaxation and sleep. In a clinical study, patients with generalized anxiety disorder who took 1,500 mg of chamomile extract daily for eight weeks experienced meaningful reductions in anxiety. That’s a concentrated dose, roughly equivalent to several strong cups of tea per day, since chamomile extract is only about 1% apigenin by weight. A cup or two of chamomile tea before bed won’t deliver the same potency as an extract capsule, but regular tea drinking still shows benefits for sleep quality and mood in smaller studies. It’s a low-risk addition to your routine, not a standalone treatment for serious anxiety.
Prescription Options for Ongoing Anxiety
If your anxiety is persistent and interferes with daily life, prescription medication may be the most effective path. The two main classes prescribed for generalized anxiety are SSRIs and SNRIs. Both work by adjusting levels of brain chemicals involved in mood regulation, and both require patience. You can expect four to six weeks before they reach full effectiveness, sometimes up to eight weeks. That delay is one of the hardest parts for people starting treatment. The early weeks can feel like nothing is happening, or side effects may appear before benefits do. Most side effects (nausea, restlessness, changes in appetite) tend to settle within the first two weeks.
For situations where you need faster relief, hydroxyzine is a non-addictive prescription antihistamine that doctors prescribe for acute anxiety. It works within 30 to 60 minutes and is sometimes used as a bridge while waiting for an SSRI or SNRI to take effect. The trade-off is drowsiness, which can be significant.
Why Benzodiazepines Are a Last Resort
Benzodiazepines work fast and powerfully, which is exactly what makes them risky. The FDA added a boxed warning in 2020 highlighting the risks of physical dependence, withdrawal, and misuse. Current clinical guidelines recommend limiting use to under four weeks. Physical dependence can develop within weeks, and it varies widely from person to person. Some people develop dependence faster than expected.
Stopping benzodiazepines abruptly after regular use is dangerous. Guidelines from the American Society of Addiction Medicine recommend tapering by only 5% to 10% every two to four weeks, with a maximum reduction of 25% every two weeks. People who have taken them for less than three months may be able to taper faster, but the process still requires medical supervision. If a doctor prescribes a benzodiazepine, it’s typically for a very short period while a longer-term treatment takes hold.
What Works Right Now vs. Long Term
If you need something today, L-theanine, chamomile tea, and breathing exercises are your fastest over-the-counter options. They won’t eliminate a panic attack, but they can take the edge off everyday anxiety within an hour. Magnesium and ashwagandha work on a longer timeline, building effects over days and weeks of consistent use.
For chronic anxiety that disrupts your sleep, your focus, or your ability to function, supplements alone are unlikely to be enough. SSRIs and SNRIs have the strongest long-term evidence, and combining medication with therapy (particularly cognitive behavioral therapy) consistently outperforms either approach alone. The most effective strategy for most people is layering: a long-term treatment that lowers your baseline anxiety, paired with faster-acting tools you can reach for on harder days.