I am not sure what you heard, but the only reason he should not take Viagra is if he is taking some types of heart medications or if he has low blood pressure.
If your worried have him split the pill into 2 parts if it is a 50mg. If it is a 100mg. have him split it into 4 parts.
Have him put the 25mg piece under his tongue and let it disolve about 30 minutes or so before you want to have sex. If it doesn't work have him disolve another 25 mg under his tongue.
I have many men "friends" that take Viagra including some with heart problems. They have no problems unless they take the 100mg pills. They say that they are too strong in that they cause flushing and vision color changes.
It is good that you want him to improve his health and to stop smoking and take better care of his body.
I hope you can go walking with him everyday or some other activity that will get the ol' pump to pumping and the blood to circulating.
But, I myself have never even heard of a problem with Viagra amongst all the guys that I know. None of my girlfriends have not either.
In fact we have taken the 25 mg of Viagra ourselves. It helps some women to have orgasms if their problem is lack of good blood circulation "down there".
I hope it works out, good luck.
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These are my thoughts on this subject. They are not intended to indicate that anyone else's thoughts are incorrect
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These are my thoughts on this subject. They are not intended to indicate that anyone else's thoughts are incorrect | 
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