Can you tell me what the adverse effects are that come with drinking a lot of "Monster?"?

The long-term effects of energy drink ingredients are that you may be addicted of this drink & addiction of any thing is harmful.
In these types of drinks it has not been mention any where that whether any medical conditions or related prescription medication will react with them.
Energy drinks must be taken properly because the ingredients used in it are powerful enough to affect your system & body.
Ingredients used in these drinks can affect your heartbeat and blood pressure. This arouses awareness from medical specialists who have conducted studies about the effects of energy drinks.
However it doesn’t means that harmful effects of these types of drinks can’t be prevented. The problem is only how to drink & in what amount that can be easily digested.
Don’t ever try to make energy drink an alternative for the lost water in the system while doing exercise because the caffeine in the energy drink can leave a dehydrating effect on your body. You should prefer to have something natural during exercises.
The most important point is that you should never combine energy drinks with alcohol because energy drink is a stimulant while alcohol is a depressant. You can imagine yourself the contrasting effect that this combination can bring in your system.

Indian Foods (source) http://www.indianfoodforever.com/food-guide/dangers-of-energy-drinks.html

I am addicted to Monster too. I can drink two cans a day. My husband works for coke. Boy! Now that I think of it Hmmm. I drink, smoke, and drink Monster. I should quit atleast one to live longer. @BoBo1946 Thanks BoBo.

I don’t drink energy drinks, I don’t even drink soda anymore. But a good friend has given up Mountain Dew for Monster, and my husband looks like he may follow suit…. I’m attempting to get in the way of that habit. lol.

I have heard of several people getting kidney stones from drinking too many energy drinks.

@Frenchfry like everything, moderation. well, almost everything! loll

Adverse effects?

Less money in your pocket.

Monster has a lot of caffeine.
Caffeine can give you… dehydration, diarrhea, bad breath, heart palpitations, dizziness, blurred vision, anxiety, insomnia, irritability, among other things.
People seem to report kidney stones as well.

You may also need to consider the sugar content of the beverage.