How long does MdDS last? It’s been 2 weeks and I still feel like I’m on a boat. How long does it take for MdDS to go away?In most individuals, the perception of rocking, bobbing, swaying, etc. following a cruise or other passive motion experience is transient. Symptoms lasting up to two weeks are considered within the normal range. usually resolve on their own. A diagnosis of MdDS is usually only given when symptoms last 30 days or more.MdDS is often self-limiting, with symptoms typically resolving on their own within 4 months (median duration according to Cha et al, 2008).MdDS may be episodic.Patients in remission (no perception of motion for 6 months) may experience recurring bouts, often associated with a precipitating event, e.g., travel or high stress. Subsequent episodes are generally more prolonged but some patients experience a quick return to baseline.