i used norxspot.com with a visa card and did get a fraudulent transaction (and i am still waiting for the meds but it's only been 10 days). thankfully, chase had flagged it as fraudulent and blocked it.
i have resolved to only use western union, paypal invoice, or bitcoin in the future. these indian sites cannot be trusted with credit cards. i suspect the real culprit may be that the folks who do their websites are either corrupt or have bad security. in any event, i would not use a card with these services. recently, i have found a dropship service on reddit that is very transparent, very secure, and has lots of positive feedback. unfortunately, there is currently a crackdown in india on certain med shipments - which may folks don't know are technically illegal in india and require a bribe to get thru the post/export agencies. however, it's india, so they just wait a while for things to calm down and start up biz as usual. due to this, you may see a recent disruption in services from these sites.