Whether or not the contraceptive pill is useful one hour beforehand depends on the type of drug, short-acting contraceptive pills are not useful, emergency contraceptive pills may be useful.
Short-acting contraceptives are mainly used to prevent pregnancy by inhibiting ovulation and changing the shape of the uterine lining, and need to be taken every day for 21 consecutive days to have a better contraceptive effect, if you miss a dose or do not take the pill according to the rules, then the contraceptive effect is not there or worse.
Emergency contraceptive pills may be useful if they are taken only once, one hour beforehand. If it is the kind that needs to be taken twice, it is necessary to take an additional pill within 12 hours afterward. If it is taken only one hour beforehand without taking additional pills afterward, then it is not effective, and if additional pills are taken afterward, then it is effective.
Therefore, it is recommended that contraceptive pills should be taken according to the rules and under the guidance of a doctor, rather than blindly taking the pills on your own.