Hi.. Welcome to HEALTHCARE MAGIC.. I am sorry to hear about your problem and will try me level best to solve it to the best of my knowledge and experience... As per your complain pimples can occur due to causes like : -Clogged pores. -Oily skin. -Hormonal Imbalances. -Bacterial infection. -Inflammation -Excess sun exposure etc. The medication given to your sister that is Minoz ER that is antibiotic Minocycline and Vizylac is Vitamin B and probiotic lactobacillus combination and is suitable for treatment of acne or pimples, but you should take it only after consulting a Dermatologist as the dosage and requirement of the medications can be assessed only after a proper clinical examination and any investigations if needed.. You should consult a Dermatologist and get evaluated at times you can be advised only topical treatment and oral medication might not be needed.. He can advise you to wash your face with Salicylic acid containing facewash.. Apply topical ointment containing Clindamycin and Benzoyl Peroxide.. Apply retinoids like Adapelene gel in thin layer on pimples at night time.. Do cool compresses over face.. Exfoliate your face twice a week to unclog the pores and remove dead skin.. You can also apply a sunscreen lotion when exposed to sun.. Oral Medication like antibiotics like Clindamycin or Minocycline and retinoid like Isotretinoin can also be advised Avoid oily food. Take more of green leafy vegetables and fruits.. You can also go for treatment like Microdermabrasion and chemical peeling.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.