While the exact relationship is complex, too much serotonin can cause symptoms that include agitation and confusion, which may be associated with increased or more distressing intrusive thoughts. Intrusive thoughts are a primary symptom of conditions like Obsessive-Compulsive Disorder (OCD), which has long been linked to abnormalities in serotonin function.
Signs and symptoms include:
Stress is the most common trigger for intrusive thoughts. But even people with normal or low stress levels can experience the occasional intrusive thought. Most intrusive thoughts fall into one of the following categories, which can feel understandably disturbing: A phobia or deep-seated fear.
Serotonin and Other Neurotransmitters
The hypothesis that an abnormality in serotonergic neurotransmission underlies OCD arose out of the observation that clomipramine, which inhibits both serotonin and norepinephrine reuptake, relieved symptoms, whereas noradrenergic reuptake inhibitors did not.
What Are the Most Common Symptoms of Excess Serotonin?
The long-term effects of excessive serotonin can result in neurological issues, including a condition called tardive dyskinesia, in which a person experiences uncontrollable jerky movements of the body.
SSRIs work by increasing the levels of serotonin, a neurotransmitter in the brain, which can help reduce the frequency and intensity of obsessive thoughts and compulsive behaviors. SSRIs are effective at reducing symptoms of OCD, but their efficacy and side effects can vary from person to person.
The 15-Minute Rule for OCD is a Cognitive Behavioral Therapy (CBT) technique where you delay performing a compulsion for 15 minutes when an obsessive thought triggers anxiety, allowing the urge to lessen naturally as you practice exposure and response prevention (ERP). It teaches your brain that discomfort decreases without the ritual, building resilience and breaking the obsessive-compulsive cycle by gradually increasing tolerance for uncertainty and distressing feelings.
Estrogen plays a role in augmenting feelings of anxiety, so high levels of estrogen can increase or lead to the development of OCD symptoms. Conversely, progesterone tends to inhibit anxiety, so a deficiency in that might lead to similar effects on OCD symptomatology.
Practicing CBT Techniques at Home
Sometimes intrusive thoughts may feel scary, shameful or offensive. They might go against our values or beliefs. For example, you might get a thought about hurting someone. This could feel shocking and disturbing to you.
Benzodiazepines, such as diazepam (Valium, Diastat) or lorazepam (Ativan), can help control agitation, seizures and muscle stiffness. Serotonin antagonists. If other treatments aren't working, serotonin antagonists such as the medicine cyproheptadine may help.
Neuroleptic Malignant Syndrome, which often times mimics serotonin syndrome, also develops over days to weeks [8,9]. Besides, in 70% of the patients, clinical signs including agitated delirium with confusion appear first, followed by tremors, rigidity, hyperthermia, profuse diaphoresis and tachypnoea [10-12].
Serotonin syndrome symptoms may be remembered with the “the 3 A's” mnemonic: altered mental status, neuromuscular abnormalities, and autonomic hyperactivity. Altered mental status refers to changes in temperament such as agitation, restlessness, or anxiety.
The only way to effectively deal with intrusive obsessive thoughts is by reducing one's sensitivity to them. Not by being reassured that it won't happen or is not true. Unwanted intrusive thoughts are reinforced by getting entangled with them, worrying about them, struggling against them, trying to reason them away.
An OCD loop starts with an obsession – an intrusive thought that brings with it a great deal of fear, shame, guilt, or disgust. There are many different types of intrusive thoughts, but they all tend to revolve around topics that you find the most horrifying.
Common types of compulsive behaviour in people with OCD include:
Chemical imbalances: Research suggests that an imbalance in neurotransmitters such as serotonin and dopamine may play a role in intrusive thoughts. High stress and sleep deprivation: A lack of rest or chronic stress can make the brain more prone to intrusive and unwanted thoughts.
During times of stress, the symptoms often get worse. A person's obsessions and compulsions also may change over time.
Serotonin plays several roles in your body, including influencing learning, memory, happiness as well as regulating body temperature, sleep, sexual behavior and hunger. Lack of enough serotonin is thought to play a role in depression, anxiety, mania and other health conditions.
Mild symptoms, which include nervousness, insomnia, nausea, diarrhea, tremor, and dilated pupils, can progress to moderate symptoms such as hyperreflexia (increased reflexes), sweating, agitation, restlessness, clonus (rhythmic muscle spasms), and ocular clonus (side-to-side eye movements).
A meta‐analysis of data indicated no significant changes in serum serotonin concentrations following supplementation with vitamin D compared to the untreated group (SMD: 0.24 ng/mL, 95% CI: −0.28, 0.75, p > 0.05) using a random‐effects model, with a large heterogeneity (I 2 = 82.6%, p < 0.001).
Serotonin syndrome, also referred to as serotonin toxicity, is a potentially life-threatening condition associated with increased serotonergic activity in the central nervous system. It is seen with therapeutic medication use, inadvertent interactions between drugs, and intentional self-poisoning [1].