If you dont get high from a sativa that means you have swag mexican sativa. Just like you can get swag mexican indica. Both are garbage and wont do anything. My sativas always reach around 20% thc (while my indica (kush, widows) are between 15%-18%. Yes you will have more yield off an indica with big torpedo round style colas that sag the plants. Sativas grow much taller, still big buds but longer and skinnier sometimes long triangular buds. The difference in high is this. Indicas especially medical ones like Kush and Widow will stop a fucking elephant in its tracks. You will choke your lungs out with each hit and only remove yourself from the couch basically for some food (alot of food). Indica is def better for sever chronic pain. Alot of indicas have a creeper affect so you really dont get fully stoned for 15 minutes or so.Your eyes will eventually swell shut, nighty night pal. Do not smoke Medical Indica and go into public during the day!!! Ok now for Sativa. The Medical Sativa high is like no other. It starts off with feeling the blood rush throughout your entire body, Its clearly a mind high that you get with mediocre pain releif. You feel so good you may even strike up a conversation with a random person out in public. You feel a great cerebral high, theres no way your going to sleep, try and even close your eyes more than 2 seconds, it wont happen. Best for day time. Smoke this at night and you will not be sleeping. You will also get a ton of shit done after smoking sativa. Your mind is sharp and on the money and not slow like an Indica strain would make you. You may even clean your house a few times because you have crazy energy and feel excellent. As far as commercial goes. And there is really good commercial out there, you just have to look harder for it. Around my area Sativa runs $125 an oz and its real good energy weed. While indica is $170 an oz for stuff that basically puts you to sleep, nothing more. In my area though Sativa is not sought after like Indica. People want way more Kush and Widow than they do Headband or Jack Herrer. But hey, weed effects everyone different. The young guys like Sativa where the older guys in my area smoke only Indica. Just remember in short, Sativa=Eneregy,cerebral,Mind affect , Moderate pain releif,Good for getting shit done. Indica=couchlock,munchies, body affect, Strong pain releif.. Wont get to much done on Powerful indica, keep in mind, Indica is best to use when your day is wrapping up.