As per as my knowledge you are not eligible for M.pharma after BSc Honors Chemistry, the eligibility criteria for the M. pharma course are as following:

Eligibility:
The applicant should hold Bachelor’s degree in Pharmacy (4 years after 10+2, including lateral entry candidates) and valid GATE or GPAT scores.

After completing BSc Honors Chemistry you are eligible for following courses:

M.Sc. Chemistry
M.Sc. Analytical Chemistry
M.Sc. Drug Chemistry
M.Sc. Organic Pharmaceutical Chemistry
M.Sc. Physical & Materials Chemistry
Master of Business Administration (MBA)

Gayatri College of Science & Management
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Ramjas College
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Ethiraj College for Women
Hans Raj College
IIT Kharagpur
M G Science Institute
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BITS Pilani
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Bhavan's R A College of Science
ISM Dhanbad
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Government Degree College (Men)
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M S R S Siddardha Degree College
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Sheth L H Science College
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