  We consider one-dimensional stochastic differential equations with
generalized drift which involve the local time $L^X$ of the solution process:
  X_t = X_0 + \int_0^t b(X_s) dB_s + \int_\mathbb{R} L^X(t,y) \nu(dy), where b
is a measurable real function, $B$ is a Wiener process and $\nu$ denotes a set
function which is defined on the bounded Borel sets of the real line
$\mathbb{R}$ such that it is a finite signed measure on $\mathscr{B}([-N,N])$
for every $N \in \mathbb{N}$. This kind of equation is, in dependence of using
the right, the left or the symmetric local time, usually studied under the atom
condition $\nu({x}) < 1/2$, $\nu({x}) > -1/2$ and $|\nu({x})| < 1$,
respectively. This condition allows to reduce an equation with generalized
drift to an equation without drift and to derive conditions on existence and
uniqueness of solutions from results for equations without drift. The main aim
of the present note is to treat the cases $\nu({x}) \geq 1/2$, $\nu({x}) \leq
-1/2$ and $|\nu({x})| \geq 1$, respectively, for some $x \in \mathbb{R}$, and
we give a complete description of the features of equations with generalized
drift and their solutions in these cases.
