No, it stays the same as long as the drugs are within the expiration date and you take them as prescribed.
Taking antibiotics can make the pill ineffective under some circumstances.
No, spotting is not an indication that the pill is ineffective.
If it's an hour and 1/2 later, im sure the pill has already been dissolved into your system. i wouldn't worry about it being ineffective if it was that long since you took your pill.
First, very few antibiotics affect the bith control pill. These include griseofulvin, rifampin, and some HIV drugs. Second, if you're pregnant, you're likely to miss a period.
No you don't need to, but remember antibiotics make the pill ineffective.
It depends on the medications you are also taking. Antibiotics will effect how birth control work.
Consult a doctor or a sexual health clinic.
If you have been having PMS and cramps the pills will help and may take away much of it. I used the pill for 20 years to stop PMS and cramps and it helped me. No doubt about it. Your periods will get shorter and lighter after a few months/years on the pill.
Yes, you can take the pill a few hours early. Early is not a problem; late is a problem.
Ineffective
No. There are very few medications that have an effect on BCP.
No. The pill is safe today. It's not like it was in the 50s when it started.