Simvastatin / sitagliptin Side Effects

It is possible that some side effects of simvastatin / sitagliptin may not have been reported. These can be reported to the FDA here. Always consult a healthcare professional for medical advice.

For the Consumer

Applies to simvastatin / sitagliptin: oral tablet

As well as its needed effects, simvastatin / sitagliptin may cause unwanted side effects that require medical attention.

If any of the following side effects occur while taking simvastatin / sitagliptin, check with your doctor immediately:

More common
  • Anxiety
  • blurred vision
  • chills
  • cold sweats
  • confusion
  • cool, pale skin
  • depression
  • dizziness
  • fainting
  • fast or irregular heartbeat
  • headache
  • increased hunger
  • nausea
  • nightmares
  • seizures
  • shakiness
  • slurred speech
  • unusual tiredness or weakness
Less common
  • Bladder pain
  • bloody or cloudy urine
  • difficult, burning, or painful urination
  • dry mouth
  • flushed, dry skin
  • frequent urge to urinate
  • fruit-like breath odor
  • increased thirst
  • increased urination
  • loss of consciousness
  • lower back or side pain
  • stomachache
  • sweating
  • swelling
  • troubled breathing
  • unexplained weight loss
  • vomiting
  • Bloating
  • constipation
  • dark-colored urine
  • fever
  • indigestion
  • loss of appetite
  • muscle cramps or spasms
  • muscle pain, tenderness, wasting, or weakness
  • pains in the stomach, side, or abdomen, possibly radiating to the back
  • yellow eyes or skin
Incidence not known
  • Agitation
  • black, tarry stools
  • bleeding gums
  • blistering, peeling, or loosening of the skin
  • burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  • chest pain
  • decreased urine output
  • diarrhea
  • difficulty with moving
  • difficulty with swallowing
  • feeling of warmth
  • hives
  • increased sensitivity of the skin to sunlight
  • irritability
  • joint or muscle pain
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • lethargy
  • pinpoint red spots on the skin
  • rapid weight gain
  • red, irritated eyes
  • red, sore, or itching skin
  • red skin lesions, often with a purple center
  • redness of the face, neck, arms, and occasionally, upper chest
  • seizures
  • severe sunburn
  • skin rash
  • sore throat
  • sores, ulcers, or white spots on the lips or in the mouth
  • sores, welts, or blisters on the skin
  • swollen glands
  • swollen joints
  • tightness in the chest
  • unsteadiness or awkwardness
  • unusual bleeding or bruising
  • weakness in the arms, hands, legs, or feet

Some simvastatin / sitagliptin side effects may not need any medical attention. As your body gets used to the medicine these side effects may disappear. Your health care professional may be able to help you prevent or reduce these side effects, but do check with them if any of the following side effects continue, or if you are concerned about them:

More common
  • Body aches or pain
  • cough that produces mucus
  • ear congestion
  • loss of voice
  • runny or stuffy nose
  • sneezing
Less common
  • Burning feeling in the chest or stomach
  • dizziness or lightheadedness
  • feeling of constant movement of self or surroundings
  • pain or tenderness around the eyes and cheekbones
  • sensation of spinning
  • skin rash that is encrusted, scaly, and oozing
  • tenderness in the stomach area
  • trouble with sleeping
Incidence not known
  • Acid or sour stomach
  • being forgetful
  • belching
  • decreased interest in sexual intercourse
  • excess air or gas in the stomach or intestines
  • full feeling
  • hair loss
  • heartburn
  • inability to have or keep an erection
  • loss in sexual ability, desire, drive, or performance
  • passing gas
  • problems with memory
  • stomach discomfort, upset, or pain
  • thinning of the hair

For Healthcare Professionals

Applies to simvastatin / sitagliptin: oral tablet


Very common (10% or more): Atrial fibrillation[Ref]


Very common (10% or more): Eczema
Uncommon (0.1% to 1%): Rash

Postmarketing reports: Pruritus, alopecia, variety of skin changes (e.g., nodules, discoloration, dryness of skin/mucous membranes, changes to hair/nails)[Ref]


Very common (10% or more): Diabetes mellitus[Ref]


Very common (10% or more): Urinary tract infection

Postmarketing reports: Erectile dysfunction, gynecomastia[Ref]


Very common (10% or more):Elevation of creatinine kinase (CK)
Frequency not reported: Elevated alkaline phosphatase and gamma-glutamyl transpeptidase

Postmarketing reports: Anemia

Elevation of CK levels of 3 or more times the normal value has been reported. This was attributable to the noncardiac fraction of CK.


Very common (10% or more): Myalgia
Uncommon (0.1% to 1%): Asthenia
Rare (less than 0.1%): Myopathy, rhabdomyolysis
Postmarketing reports: Immune-mediated necrotizing myopathy

Postmarketing reports: muscle cramps, myalgia, rhabdomyolysis, arthralgia, pain in extremity, back pain[Ref]


Common (1% to 10%): Abdominal pain, constipation, nausea, flatulence, gastritis
Uncommon (0.1% to 1%): Acid regurgitation, diarrhea, dyspepsia

Common (1% to 10%): Abdominal pain, constipation, nausea, flatulence
Uncommon (0.1% to 1%): Acid regurgitation, diarrhea, dyspepsia, pancreatitis

Postmarketing reports: Pancreatitis, acute pancreatitis, including fatal and non-fatal hemorrhagic and necrotizing pancreatitis, constipation, vomiting


Common (1% to 10%): Edema, swelling[Ref]


Common (1% to 10%): Hypoglycemia

Nervous system

Common (1% to 10%): Headache, insomnia, vertigo

Common (1% to 10%): Headache

Postmarketing reports: Peripheral neuropathy, dizziness, paresthesia[Ref]


Common (1% to 10%): Upper respiratory infection, bronchitis, sinusitis

Common (1% to 10%): Upper respiratory tract infections, nasopharyngitis

Postmarketing reports: Interstitial lung disease[Ref]


Uncommon (0.1% to 1%): Elevated transaminases

Postmarketing reports: Hepatitis/jaundice, fatal and non-fatal hepatic failure, hepatic enzymes elevation


Postmarketing reports: Anaphylaxis, angioedema, lupus erythematous-like syndrome, polymyalgia rheumatic, dermatomyositis, vasculitis, purpura, thrombocytopenia, leukopenia, hemolytic anemia, positive ANA, ESR increase, eosinophilia, arthritis, arthralgia, urticarial, asthenia, photosensitivity, fever, chills, flushing, malaise, dyspnea, toxic epidermal necrolysis, erythema multiforme (including Stevens-Johnson syndrome).

Postmarketing reports: Anaphylaxis, angioedema, rash, urticarial, cutaneous vasculitis, exfoliative skin conditions including Stevens-Johnson syndrome[Ref]


Postmarketing reports: Worsening of renal function, including acute renal failure (sometimes requiring dialysis)[Ref]


Postmarketing reports: Cognitive impairment (e.g., memory loss, forgetfulness, amnesia, memory impairment, confusion)

Postmarketing reports: Depression

Cognitive impairment is reversible up on statin discontinuation.


1. "Product Information. Juvisync (simvastatin-sitaGLIPtin)." Merck & Company Inc, Whitehouse Station, NJ.

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