Is marijuana harmful or healthy? does it effect memory ? does it causes impotency ? how it can be taken for a good and healthy living?

Depends: This depends on why you are taking it and how you are using it. There are some benefits for cancer pain, other medicinal uses. However, for most of us it is not a good idea. Yes, it can affect your memory. Yes it can cause impotency. Marijuana is not a component of a "good and healthy life" whatsoever. Other psychiatric effects are noted here http://bjp.rcpsych.org/content/178/2/116

Don't believe it can: Impotency can be related to mj use Concern for brain of young people Chronic smoking can cause lung disease . Here are list of common side effects: Hypertension Headaches and migraines Blurred version Gum inflammation Sleeping disorder Ear ringing Brain disorders-includes memory Body or joint pain and inflammation Liver and kidney inflammation May have value to treat some medical conditions

Complicated: Dr Blumenfield's answers cover the adverse effects, but certain extracts of marijuana can help control certain types of epilepsy, may assist spasticity, and may help some with migraine headaches. But rather bad for the immature brain, i.e., up to age 25 or 26, and especially a problem in those with psychiatric history. Medical marijiuana has potential, not sure, re recreational use.