(This is not meant to serve as medical or mental health advice. Always seek advice from your medical provider or psychiatrist about medications.)
A nice aspect about Obsessive Compulsive Disorder is that, as far as disorders go, it is relatively new in terms of our contemporary understanding of it. As such, there is considerable research actively exploring all aspects of it.
Most notable are research endeavors exploring the biological underpinnings of OCD –where it is on the human genome, the role of various neurotransmitters, and the potential of gut enzymes playing a part.
Research has led to advancements in psychotropic interventions (medications primarily for mental health aspects). Early on the only medications were antipsychotics, that primarily only tranquilized a person. Eventually, early tricyclic antidepressants, such as clomipramine (Anafranil) offered more relief and specifically helped OCD symptoms.
It has only been in the past few decades that SSRI medications (Selective Serotonin Reuptake Inhibitors) have been used to treat OCD. At this point in time, SSRIs have been the most effective in relieving OCD symptoms. They do so, by keeping more serotonin available in the synaptic cleft of the neuron, enabling it to transmit messages better. Further information on medication interventions to come.
Thanks for reading!