Hello, I am 70 and have been on 300mg of quinine every day for many years, now my Dr (of 2years ) has hinted that it may be to much, (but he says it must be OK I look alright, shrug.). I have just read effects of too much, and a lot of symptoms relate to me, but I was putting them down mostly to my diabetes,( type 2 on insulin,metformin,gliclazide etc ). Maybe to many to list here, but vision,tension,nightmares,lack of sleep, nerves,rapid heart beat, aches and pains in back and side etc etc. May I have your opinion and maybe help please. Kind regards Tony Heath. NZ