Indica strains have a calming, sedative effect. Good for reducing nausea, stimulating appetite, and relieving eye pressure. Indica plants have the most pain blocking qualities so they are effective for patients with almost any kind of pain.
Sativa strains usually have a more energetic effect than indica strains. Sativas stimulate serotonin, which controls mood and appetite. Because its effects are less sedative, sativa strains are sometimes preferred during the day.