Vitamin P may refer to:

• Flavonoids, referred to as vitamin P from the mid-1930s to early 1950s
• Fluoxetine (Prozac), euphemistically referred to as vitamin P, a selective serotonin reuptake inhibitor used for depression and various mental disorders
• Paroxetine (Paxil), euphemistically referred to as vitamin P, a selective serotonin reuptake inhibitor used for depression and anxiety disorders
• Prolintane, euphemistically referred to as vitamin P, a norepinephrine-dopamine reuptake inhibitor stimulant