Are there any side effects of too much vitamin d? i take about 5000 ius

Indeed, there are!: Too much vitamin D can cause calcium blood levels to rise resulting in fatigue, loss of appetite, weight loss, etc. The recommended daily allowance of vitamin D for an adult male is 600 IU, so 5000 is a lot to take every day. You should have a 25-OH (hydroxy) vitamin D level measured to make sure you are not in the toxic range. Then your doctor can advise on the proper intake. Be well:)

Probable: Vitamin D toxicity leading to hypertension, kidney stones etc had been well documented. The toxic dose of vitamin D3 is less understood but one suspects that with extremely high level, one may end up with toxicities. The best way to tell is by measuring your blood vitamin D3 level to assess your need. The upper limit should not exceed 100 ng.