By performing CASE TAKING and REPERTORIZATION simultaneously, we can save much time, same time making very accurate prescriptions. Innovative tools and platforms provided in my SIMILIMUM ULTRA SOFTWARE is very helpful in this regard. I am reporting a case of pre-menstrual headache in a 35 yr old lady, cured by a drug selected using only ‘particular modalities’. I worked out the case and reachedsimilimum with in 5 minutes using Similimum Ultra Software. The lady first told me she is having violent headache before ever menses. Using key-words ‘headache’, ‘menses’ and ‘before’, I instantly located following rubric and added to the RUBRIC BASKET of my software: [Kent]Head : PAIN, headache in general : Menses :Before: – Acon., Agn., Alum., Am-c., Arg-n., Ars., Asar., Bell., Bor., Bov., Brom., Bry., Bufo., Calc., Calc-p., Calc-s., Carb-an., Carb-v., Caust., Cimic., Cinnb., Cupr., Ferr., Ferr-ar., Ferr-i., Gels., Glon., Graph., Hep., Hyper., Iod., Kali-p., Kreos., Lac-c., Lac-d., Lach., Laur., Lil-t., Lyc., Manc., Meli., Merc., Nat-a., Nat-c., Nat-m., Nit-ac., Nux-m., Nux-v., Ol-an., Petr., Phos., Plat., Puls., Sep., Sil., Stann., Sulph., Thuj., Verat., Vib., Xan., Zinc. Next, she said she had vomiting along with this menstrual headache. Using key words ‘headache’, and ‘vomit’, I located and added this rubric: [Kent]Head : PAIN, headache in general : Vomiting: – Ars., Asar., Bar-m., Con., Eug., Ferr-p., Glon., Iris., Lach., Lyc., Mez., Nux-v., Phyt., Sec., Sep., Verat. Then I asked her, are there any factors that gave any relief to this headache. She told, she would get some relief if she lie in a dark room and get some sleep. I used key words ‘headache’ ‘sleep’ and ‘amel’, and got this rubric, and added it: [Kent]Head : PAIN, headache in general : Sleep : Amel.: – Acon., Bad., Glon., Hell., Ign., Pall., Sep., Sil. Then I used ‘head ache’ and ‘dark’ as key words, and located this rubric, added it to the RUBRIC BASKET: [Kent]Head : PAIN, headache in general : Lying : In a dark room : Amel.:- Acon., Bell., Brom., Bry., Lac-d., Podo., Sang., Sep., Sil. At this stage, I used QUICK PICK tool in my software to see which are the drugs that cover these FOUR particular symptoms. Only SEPIA was there! Case taking, repertorization and prescribing were over by FIVE MINUTES! Her facial expressions, body structure, way of talking, everything reminded me she is SEPIA. I decided to try SEPIA without further workout. SEPIA 30 was given TDS during headache, followed by BDS until next menstrual period. Headache never recurred. This case taught me how simple it is to make a homeopathic prescription and get a nice cure.