Is it ok to take 100m viagra? i'm 31 6'3 480lbs with fairly good blood pressure. i also don't take any medication. i've tried hims in the past but they did not work?

Lack of effectiveness of this medication is likely to be related to your morbid obesity. Talk to your doctor to ascertain if a different medication may be effective. Easier said than done, but losing weight is imperative; or you may not be able to sex due to your obesity being a physical impediment.

Yes it is. But you probably would not need it if you lost weight and became physically fit.