Anxiety and Depression: Causes, Treatment & Care

If you’ve ever felt like you’re carrying both a racing mind and a heavy weight at the same time, you’re not imagining things. Anxiety and depression are two common mental health conditions that often overlap.

That overlap isn’t a coincidence. It isn’t bad luck. It’s biology, behavior, and brain chemistry doing something very predictable — and something that, with the right support, is very treatable. 

At AIM: Advaita Integrated Medicine, we treat anxiety and depression as the connected conditions they are. Here’s what that looks like — and why it matters for your care. 

Written by: Corey Kennedy, MSW, LCSW | Executive Director

What Is Mixed Anxiety and Depressive Disorder?

Mixed anxiety and depressive disorder refers to a pattern where symptoms of anxiety and depression show up at the same time, often feeding into each other. Rather than existing as separate experiences, they tend to overlap—worry, restlessness, low mood, and fatigue blending in a way that can be difficult to untangle. 

In practice, people rarely present with a single, clearly defined diagnosis. More often, they come in describing a mix of symptoms that don’t fit neatly into one category. When both anxiety and depression are present, focusing on only one can leave the other operating in the background, shaping how someone feels and limiting how much progress they experience. 

Common symptoms of mixed anxiety and depressive disorder include:

Overlapping symptoms

• Trouble sleeping or staying asleep 

• Difficulty concentrating 

• Fatigue and low energy 

• Irritability 

Anxiety-specific symptoms

• Persistent worry or sense of dread 

• Physical tension, racing heart, shortness of breath 

• Avoidance of situations that feel overwhelming 

• Hypervigilance 

Depression-specific symptoms

• Persistent low mood or hopelessness 

• Loss of interest in things that used to bring joy (anhedonia) 

• Withdrawal from relationships and activities 

• Feelings of worthlessness or guilt 

Understanding which symptoms belong to which condition — and how they’re interacting is very important for developing a meaningful treatment plan.

How Do Anxiety and Depression Feed Each Other?

Anxiety and depression create a self-reinforcing cycle. Anxiety drives avoidance behaviors — withdrawing from social situations, pulling back from work, isolating — which then triggers and deepens depression. As depression worsens, anxiety about the future increases. Without treatment that addresses both conditions at once, each one continues to fuel the other. 

Think about what that looks like in real life. Someone dealing with intense anxiety might start avoiding things that feel overwhelming — social situations, challenging themselves at work, making plans with friends. The avoidance feels like relief in the moment, but over time it quietly shrinks their world. 

The less they engage, the more isolated they become. The more isolated they become, the more their mood starts to drop. They stop experiencing things that used to bring them joy. And now they’re not just anxious. They’re anxious and depressed. 

The reverse runs just as true. Depressive symptoms — low energy, hopelessness, withdrawal — can increase a person’s anxiety about the future, relationships, about whether things will ever get better. One condition becomes fuel for the other, and the cycle becomes harder to interrupt without help.

How anxiety and depression fuel each other:

• Anxiety drives avoidance → avoidance deepens depression. When anxiety makes situations feel overwhelming, the natural response is to pull back. But withdrawal cuts off the relationships, activities, and experiences that protect against depression — and the mood drops as a result. 

• Depression erodes confidence → low confidence increases anxiety. When someone is struggling with depression, their sense of capability shrinks. That shrinkage creates more worry about the future, about relationships, about whether things will ever change — feeding the anxiety that was already there. 

• Poor sleep worsens both. Disrupted sleep is one of the clearest shared symptoms — and it works against recovery from both conditions simultaneously. Anxiety keeps the mind activated at night. Depression disrupts sleep architecture. Either way, exhaustion makes everything harder to manage. 

• Avoidance becomes a trap. What starts as an anxiety response — skipping the social event, calling out of work, canceling plans — gradually becomes a pattern that reinforces depression. The world gets smaller. Opportunities for connection and reward disappear. And both conditions tighten their grip.

• Each condition makes the other harder to treat. Untreated depression can blunt the motivation needed to engage in anxiety treatment. Untreated anxiety can make it nearly impossible to access the stillness that depression recovery often requires. This is why treating them in parallel isn’t optional — it’s the only approach that addresses what’s happening.

What Is the Difference Between Anxiety and Depression?

While anxiety and depression share overlapping symptoms — fatigue, sleep disruption, difficulty concentrating — they differ in key ways. Anxiety is characterized by persistent worry, heightened arousal, and avoidance. Depression is characterized by low mood, loss of interest, and withdrawal. Because symptoms overlap significantly, both conditions should be assessed and tracked simultaneously using validated clinical measures. 

That distinction matters clinically, because the treatment targets are different. If your anxiety is improving but your depression isn’t moving, that tells your provider something important — and it should change what happens next. Without tracking both, that signal gets lost. 

Why Tracking Anxiety and Depression Together Leads to Better Outcomes

One of the things we do at AIM that genuinely changes patient outcomes is track anxiety and depression simultaneously, from the very first appointment. 

At the start of care, every patient completes both a PHQ-9 (which measures depression symptoms) and a GAD-7 (which measures anxiety). These aren’t one-time snapshots — they’re attached to every appointment, so our providers can see, in real time, whether your treatment is working.

Here’s why that matters in practice:

• If your GAD-7 improves but your PHQ-9 doesn’t, your provider knows the anxiety is responding but the depression needs a different approach 

• If both scores are stagnant after several sessions, that’s a signal to reassess — medication, therapy focus, or level of care 

• If one score worsens while the other improves, that tells the clinical story of how these two conditions are interacting in your specific case 

• Progress becomes visible and measurable — not just a feeling, but a data point your whole care team can act on

Without those measures, you’re working with incomplete information. You might spend months feeling like something still isn’t right and not know why. 

In our 2025 outcome data, among patients who entered care with severe presentations of both anxiety and depression, 35% exited with scores below moderate on both measures.  

That kind of movement reflects what happens when treatment is integrated, consistent, and responsive to what the data is showing. 

(Can we add the anxiety and depression slide in this section from the deck I sent you?)

What Medications Are Used for Anxiety and Depression?

Common medications for anxiety and depression include SSRIs, SNRIs, mood stabilizers, and in some cases atypical antidepressants such as bupropion. The right medication depends on the specific presentation, symptom severity, and how a patient responds over time. 

 At AIM, medication management is paired with ongoing outcome tracking, so providers can adjust quickly when something isn’t working. 

Medication classes commonly used for anxiety and depression: 

• SSRIs (selective serotonin reuptake inhibitors) — often a first-line treatment for both conditions 

• SNRIs (serotonin-norepinephrine reuptake inhibitors) — effective for anxiety and depression, particularly when physical symptoms are present 

• Mood stabilizers — used when mood dysregulation is a significant part of the picture 

• Atypical antidepressants such as bupropion — useful when standard options haven’t produced adequate response 

• Short-term anti-anxiety medications — sometimes used to manage acute symptoms while longer-term treatments take effect

This isn’t a set-it-and-forget-it process. Effective psychiatry requires regular contact, tracking your response over time, and making adjustments when the data shows something needs to change. 

Anxiety and Depression Treatment Options: What to Expect at AIM

There’s no single path through anxiety and depression. What we offer is a connected system of care that can meet you wherever you are — and follow you as your needs change.

Levels of care available at AIM:

• Psychiatry and medication management — for people who need clinical oversight of medication alongside tracking and regular follow-up 

• Individual therapy — evidence-based approaches including CBT and DBT, targeting the patterns and behaviors driving symptoms 

• Mental Health IOP — intensive outpatient programming for people whose symptoms aren’t responding adequately to standard outpatient care, without requiring inpatient hospitalization 

TMS (Transcranial Magnetic Stimulation) — a non-invasive, FDA-cleared option for depression that hasn’t responded sufficiently to medication

The key is having these options connected within a single system of care. When services are fragmented, people often have to restart with new providers each time their needs change, which can disrupt progress and lead to gaps in treatment. A systems-based approach allows care to evolve more smoothly—so when something needs to shift, it builds on what’s already been understood rather than starting from scratch. 

You Don’t Have to Know Where to Start

One of the most common things we hear early in care is some version of: “I don’t know if I’m more anxious or more depressed.” The good news is you don’t have to know. That’s our job. 

What we know is that anxiety and depression rarely travel alone — and that treating them as separate, unrelated problems misses what’s really happening. When you can see the full picture, measure it accurately, and bring the right level of care to each piece of it, people get better.