Constant, distracting sexual thoughts can be distressing and may stem from anxiety, obsessive-compulsive tendencies, or compulsive sexual behavior. There is no single pill to cure this, but highly effective treatments are available. I recommend consulting a psychiatrist or therapist first. Cognitive Behavioral Therapy (CBT) is excellent for learning to manage and redirect intrusive thoughts. Depending on the underlying cause, a doctor may prescribe medications like Selective Serotonin Reuptake Inhibitors (SSRIs). These can help manage obsessive thinking patterns and often have a side effect of naturally dampening a high sex drive. A professional evaluation is the safest first step.