** Shares of drugmaker MannKind MNKD.O fall 6.7% to $3.32 premarket

** Company reports Q1 revenue of $90.2 million, missing analysts' average expectation of $106.6 million - data compiled by LSEG

** Says collaborations and services revenue decreased due to fewer units sold to partner United Therapeutics UTHR.O

** MNKD reports Q1 loss of 5 cents per share, compared with a 4-cent loss a year earlier

** Up to last close, shares down 37.2% this year