- B-23-C,S.I.T.E.,Manghopir Road, Karachi
- www.obs.com.pk
- 021-35839623
- 111-247-247
- C-14,Manghopir Road,S.I.T.E., Karachi
- www.obs.com.pk
- 021-32573391
- S-209,Industrial Area,Kot Lakhpat, Lahore
- www.obsons.com.pk
- 042-35153572
- C-52,Block-4,Gulshan-e-Iqbal, Karachi
- www.oncovanz.com
- 03032967029
- LC-41,L.I.T.E.,Landhi, Karachi
- www.opal-labs.com
- 021-35011046
- 58-B/1,Khayaban-e-Sehar,Phase-VII,D.H.A., Karachi
- www.ophthpharma.com
- 021-35241925
- Plot #241,Sector-24,Korangi Industrial Area, Karachi
- www.ophthpharma.com
- 021-35051683
