Wow, you're taking 2,000mg of Vitamin C at once by combining them. I hope you only take that once per day, here is what can happen if you take too much Vitamin C.
Are there any risks associated with too much vitamin C?
When obtained from food sources and supplements in the recommended dosages, vitamin C is generally regarded as safe. Side effects are rarely reported, but include nausea, vomiting, heartburn, abdominal cramps, and headache. For most healthy individuals, the body can only hold and use about 250mg of vitamin C a day, and any excess is lost though urine. At times of illness, during recovery from injury, or under conditions of increased oxidative stress (including smoking), the body can use greater amounts. High doses of vitamin C (greater than 2,000 mg/day) may contribute to the formation of kidney stones, as well as cause severe diarrhea, nausea, and gastritis.