Hi,

Welcome to HCM

Side effect of birth control pills can be pain abdomen, nausea, vomiting, tiredness, weakness, headache, loss of libido, menstrual irregularities, etc.
1. Get your gf clinically assessed by a doc. She is getting blurry vision, it can be dizziness that she is unable to define, it can be due to weakness, headache can be due to eye-sight problem, she may need an eye check-up.
2. It is important to get her hemoblobin (Hb%) level checked, get her blood tests done to confirm fitness. Low blood pressure often results in headache.
3. She should take vitamin or mineral supplements.
4. She can take some other substitute for the birth control pill that suits her better after consultation with a gynae.
5. Abdominal pain can be due to gastritis. Antacids will give relief. Abdominal pain can also be due to some infection, pelvic inflammatory disease, cysts, fibroid,etc. An USG will help to confirm diagnosis.
6. She should avoid smoking, alcohol or addiction of any kind, avoid oily spicy food. Healthy nutritious, rich in minerals and proteins is what she needs, she should keep bowels clean and properly hydrate herself.

Take care.

Hello Matthew,

Thanks for posting on HCM,
I can see that you are a concerned boyfriend. Amongst the various side effects of aviane birth control (ethinyl estradiol / levonorgestrel) we sudden and severe headache, confusion, problems with vision, speech, or balance, nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes) etc. According tot he manufacturers of this product, the above side effects are considered serious and the user should stop and call/visit a doctor as soon as possible.
If those symptoms started almost the same time as when she started the birth control and have persisted later, then it is most likely related to aviane and she will be required to stop. Most side effects wear off or the consumer adapts to it effects, but if your girlfriend keeps having the symptoms that applies she should stop.
Non-the less other causes need to be investigated such as eye disorder which could not be related to the medication and that could also be responsible for the headache. She is advised to see an eye specialist. Those short term blurry vision could be due to deficiency of vitamin A (but usually it is night blindness).

Hope this was helpful