Plavix is a brand name of a blood thinning medicine called clopidogrel. It has hardly any effect on either appetite or eating habits.
Toprel is the brand name of a medicine called ramipril. It reduces blood pressure and does not cause any significant effect on eating habits or appetite.
Your mother has been prescribed a very expensive, over-priced brand Plavix that costs around Rs. 110 per tablet while exactly the same medicine with same quantity and same quality is sold at Rs. 6 by Cadila Healthcare - one of Indias major drug company of repute. You can change the brand if you so desire.