What happens to your heart if you take drugs?

This question isn't detailed enough.

Taking drugs in the correct dosages help you, and can even make your heart better if that's what they are being taken for.

But some drugs, if abused, can increase, or decrease your heart rate, and could either put you into cardiac arrest, or make your heart stop all together.

It also causes palpitation and increases the blood pressure causing the heart to pump more blood faster and faster. Eventually the heart will get tired and the person might suffer a stroke or a heart attack also known as myocardial infarction.