TRENTON, N.J. — The federal government said Monday that it wants to force drugmakers to disclose prices for prescription medicines in their TV commercials. The drug industry’s main trade group said drug companies are only willing to disclose the prices on their websites, not in commercials, and they’ll start doing that next spring. Health and Human Services Secretary Alex Azar unveiled a proposal that would apply to all brand-name drugs covered by the Medicare and Medicaid programs, which is most medicines. “Patients deserve to know what a given drug could cost when they’re being told about the benefits and risks it may have,” Azar said in prepared remarks.