Not really, this is very much of a gray area and currently is on debate.
Yes, there definitely is restriction on off label promotion and in serious case could be considered as an act of criminal and civil fraud perpetrated by unscrupulous manufacturers (under the False Claims Act, and misbranding actions by the FDA). There are some famous cases (Eli Lilly in 2009, Pfizer in 2009, Abbott Labs in 2012, JNJ in 2013).
However, in recent years, "the trend toward heightened constitutional protection of commercial speech in the health care arena has opened up opportunities for off-label promotion without threat of liability. Proponents of both off-label drug promotion and expanded protection of commercial speech argue that, in an era of increasing transparency in health information, citizens have a right to know about any evidence that a drug might be effective for a particular off-label use."
Such argue bases on First Amendment right to free speech. Besides the 2012 case,
US v. Caronia leading to some changes in off-label promotion, the recent famous case is AMRN v U.S. FDA, settled in March 2016. In this case, the agency has seemingly agreed to refrain from bringing misbranding actions against truthful, non-misleading off-label promotion, and has shifted the burden onto the company to ensure the communications meet the standard. Two bills: Medical Product Communications Act of 2017 (H.R. 1703) and the Pharmaceutical Information Exchange Act (H.R. 2026) are currently under debate through Houses
In June 2018, the FDA has issued final guidance clarifying what it considers permissible off-label information for device makers and drug companies to convey to potential customers. "Additionally, it’s our belief that giving companies clear guidelines for providing payors with truthful and non-misleading information about unapproved products and unapproved uses of approved or cleared products will help facilitate communications that can allow payors to provide coverage for these new products and new uses more quickly after FDA approval or clearance"
https://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm610415.htm
So, yes, it is still illegal to promote off-label usage (especial to direct consumers) but it is not illegal to share truthful, non-misleading certain types of information about unapproved products or off-label uses of approved products with healthcare providers (e.g: Information about the indication(s) sought, Factual presentations of results from studies...). In this specific case, sharing factual information regarding studies of cITP indication, anticipated timeline for possible FDA approval..., factual information about its safety and efficacy profile to elevate platelet production in low platelet count condition from actual studies (it might benefit patients suffering from such condition...).
It is a thin line between off-label promotion and sharing factual information but you should be trained what information is allowed to share and discuss?