题目内容：

A daily multivitamin may give your well-being an extra benefit, but if you’ve ever swallowed one and felt sick right after, you know it’s hardly a pleasant experience. 1.

◆ You’re taking vitamins on an empty stomach.

Vitamins that are more acid in nature, like vitamin C, may cause nausea（恶心）if they’re consumed on an empty stomach. Vitamins A, D, E and K, unlike some others, may be better absorbed when not taken with food.

◆ 2.

Vitamins are like medicines in that they can act on each other and other medicines you’re taking. 3. Some research suggests that multivitamins could cause side effects when taken at the same time estrogen（雌激素）levels are raised.

◆ There’s a lot of iron in your pill.

Multivitamins that contain a lot of iron or iron supplements themselves can cause nausea. This is especially true if you’re taking them outside of a meal. Iron is interesting in that it’s best absorbed on an empty stomach, but it’s hardest to take on an empty stomach because of the nausea. 4. It might decrease the absorption a little bit but it’s better than nothing.

◆ Allergic Reaction Side Effects

Since multivitamins contain so many vitamins and minerals, allergic reactions are certainly possible. Mild allergic reactions can include itchiness（痒）and a few hives（荨麻疹）. 5. Should you experience more advanced signs of an allergic reaction, such as trouble breathing, chest pain, widespread hives or a swollen facial region, visit the closest emergency room immediately.

The label on your vitamins should provide directions for taking them check the information before taking it to see what else you should know.

A. You’re taking vitamins with other medicines.

B. Below are a few reasons why they may be making you ill.

C. It’s important to discuss with an expert the timing of these vitamins.

D. These stomach issues can be extremely disturbing.

E. It’s better to take it with food than trying to take it on an empty stomach.

F. If you experience these side effects, stop use and contact your doctor.

G. Please review the combinations to make sure there are no harmful interactions.