Anti-psychotic medicines can also make you sleepy or dizzy, and they can cause skin rashes, rapid heartbeat, blurred vision, and muscle shakiness or stiffness. Some can also make you gain weight and put you at risk for diabetes or high cholesterol.
These side effects can happen whether you take the daily pill or the shot. The difference is that the long-acting type takes more time to leave your body. Your doctor can stop or change the dosage of daily medicine that's causing a bad reaction, but you'll have to wait weeks for a long-lasting drug to run its course.