Original sentence: It has been shown that marijuana use may suppress the immune system.One of the more detrimental effects of marijuana is impaired memory function while the user is under the influence of the drug.Studies have also concluded that cannabis use is just as tough on the lungs as tobacco.Usage can also lead to physical addiction with.withdraw symptoms of irritability, anxiety, and depression which go away after about 10 days
Edited sentence: One of the more detrimental claimed effects of marijuana is impaired memory function while the user is under the influence of the drug, thpough its actual effect on both short term memory and episodice memory remains unclear