A friend of mine has an essential tremor disorder. She smokes weed almost everyday because she said it helps her to stop shaking. She tried all kind of medicines doctors have prescribed her, and botox and acupuncture. None of them helped her. Any advice?

I've heard that drinking coffee and grapefruit juice at around the same time can extend the effects of caffeine. Is this true? I know that grapefruits can increase the bioavailability of some drugs... what about caffeine? Is this at all dangerous?

Are the health risks of drinking Red Bull and vodka in moderation (two to three) drinks an evening any greater than drinking two or three rum and Cokes, or two or three anything and Mountain Dew?

My girlfriend tells me she uses marijuana to calm herself if she is having a stressful day. She has been doing this for many years. She says smoking pot is like self-medicating — it is better than using anti-depressants. She also claims smoking pot helps with depression because of how it helps produce serotonin in the body. What is serotonin and how does it help depression? Does smoking pot really help with managing your anxiety, depression, etc.?

Are there different sugar levels in different alcoholic beverages? I am hypoglycemic and have noticed different hangover levels contingent on the sugar level of alcohol consumed. Some have told me that Scotch has the least amount of sugar of all alcoholic beverages. Since I occasionally enjoy a drink, I would appreciate knowing the lowest sugar content.

(1) I have a daughter who just joined AA. She has a drinking problem. What are our responsibilities to her as a husband, father, mother?

(2) Should any alcohol be kept in her house or our house (we are the parents) when she is around?

(3) It has been said that alcoholism runs in families — is this true? Does it seem to skip generations? If so, why?

Is it ok to drink alcohol while taking Xanax?