Sour Diesel, or "Sour D," is a legendary, fast-acting sativa-dominant hybrid (roughly 90% sativa) known for its pungent, diesel-like, and citrusy aroma. Popular since the 1990s, it delivers dreamy, cerebral, and energizing effects. With high THC levels, typically ranging from 17% to 26%, it is used to relieve stress, pain, and depression. 
Key Details About Sour Diesel:
Genetics: Believed to be a cross between Chemdawg and Super Skunk.
Potential Side Effects: While highly popular, some users report feeling paranoia, or anxiety if consumed in high doses, and it can cause dry mouth. 
Effects: Energetic, talkative, uplifting, and creative. It is often described as a "daytime" strain that provides a mental boost without heavy couch-lock.
Flavor/Aroma: Pungent, diesel, chemical, skunk, and lemon.
Medical Uses: Often used to combat fatigue, chronic pain, anxiety, and depression.