You have to attest your Pharmacy Degree from Saudi Culture Mission before proceeding to Saudi Arabia, because attested degree is needed in registeration process with Saudi Commission for Health Specialties.
Actually office of "Ministry of Higher Education - Saudi Arabia" is located inside the Saudi Culture Mission, that attest your Degree.
They only attest your last degree i.e. Pharmacy degree; not Matric & F.Sc.
Also the degree must be attested from HEC before attestation from Saudi Culture Mission.
This post cover the procedure of Attestation if you have proper Job offer letter from your employer & Letter for attestation from Employer.
Visa Profession must be Pharmacist, if you are going for attestation by this procedure. (otherwise they will reject your application for degree attestation).
Notice pasted on entranc of Saudi Culture Mission.
Address of Saudi Culture Mission, Islamabad.