Along with its needing effects, a drug may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Less common
Fast, pounding, or irregular heartbeat or pulse; palpitations
Rare
Dizziness; fainting or feeling faint; persistent, painful erection; seizures; fainting
Symptoms of overdose
Get emergency help immediately if any of the following symptoms of overdose occur
Drowsiness; sleepiness; slurred speech
More common side effects may occur that usually don't needed medical attention. These side effects may go away during treat as your body adjusts to the drug. However, check with your family doctor if any of the following side effects continue or are bothersome.
More common
Lack or loss of strength; weakness; uncontrollable movements of body parts; constipation; diarrhea; acid or sour stomach; belching; heartburn; indigestion; stomach discomfort, upset or pain; difficulty speaking; drooling; loss of balance control; muscle trembling; jerking or stiffness; restlessness; shuffling walk; stiffness of limbs; twisting movements of body; nausea; rash; weight gain
Less common
Change in vision; loss of appetite; weight loss; dry mouth; inability to move eyes; increasing blinking or spasms of eyelid; sticking out of tongue; trouble in breathing, speaking or swallowing; unusual facial expressions; itching or reddening of skin; cracked, dry, scaly skin; swelling; muscle tightness; muscle ache; feeling faint upon standing; stuffy nose; runny nose; sneezing
More common side effects not listed above may also occur in some diseaseds. If you have any other problems, check with your family doctor.