Common ones include: Flushing of the skin. It can be a sign of a thickening of the blood vessels as well as other conditions, so you may need further tests. Both medications are generic now and can be found at discounted rates, making them more accessible to the public than ever before. Side Effects Are Minimal. Daily doses are often between 2. Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees.Common Cialis side effects may include: headache; flushing (warmth, redness, or tingly feeling); nausea, upset stomach; stuffy nose; or. muscle pain, back pain, pain in your arms, legs, or back. This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. not available over-the-counter (OTC) Was this helpful? How does Cialis work? Cialis works by increasing blood flow to the penis to help a person get and maintain an . This is why it’s so important to get medications like Cialis and Viagra from proper online pharmacies and not over the counter. Was this helpful? Can I take Cialis or tadalafil on.