Thanks for the query
Out of all the malarial drugs antremesnin drived anti malarial drugs are found to be safe in pregnancy
. However it is not used to prevent it but only treat it. The prevention is done with chloroquine or doxycycline both have proved to be deletrious is pregnancy. Please meet a doctor and not a pharmacist.
I suggest u apply anti mosquito gels, mats, coils to prevent malaria and not use drugs.
Have a healthy living